Hello & welcome to IMF!
First off, by your stats I dont' think your bodyfat is really that bad - for your height & current weight. So just to keep things in perspective

Also each of us have our own unique bodyfat distribution based on genetics as well as hormones. Estrogen is what lets us women have a higher concentration of fat cells usually anywhere from the mid-section down to the thighs (intended to be a survival trait to help protect a fetus). To that end, when you diet / train to drop bodyfat, you lose it proportionally across your body. This can be frustrating because where you usually want to lose it the most, is going to be the "slowest" to show the change - e.g. if you lose 2% bodyfat, you may notice it more in your upper body where women tend to hold fewer fat cells, so 2% of a smaller amount will be more dramatic than 2% of a larger amount. Since you can't "spot reduce" or "pick" where you want to drop fat, you really just need to be patient and continue what you are doing w/ your diet / training.
In terms of "fat burners" & ephedrin / ECA, here's some info below. Definitely feel free to throw in an OTC fat burner or make your own ECA stack, but I would suggest you post up your current diet as well - DIET is always your primary force that determines what your body responds to. Fat burners can do a small bump in 'burn' efficiency & IMO more than anything, give you a kick in the pants when you hit the gym or go to do cardio in the morning, but its not going to do the heavy lifting that your diet should be doing. I.e. if your diet is not optimized, then just adding ECA or some fat burner is not going to "fix" it. If you've been getting slow results for 6 months of effort, my first guess would be that your diet isn't optimized, and where you are now is the direct result of the way you currently eat plus the training & cardio. So it may be that the training & cardio is being hindered instead of helped by your diet. If you can post up your meal plan & portions, I bet we can find some simple tweaks to make things work a little better, e.g.
Meal 1 (8 am)
1 whole egg + 3 egg whites
1 c oatmeal
1 c coffee
Meal 2 (11 am)
2 pieces of whole wheat bread
4 oz chicken
etc.
It is also useful if you can put your meal plan into a food counts program like
www.fitday.com to get an accurate accounting of your total calories, and macro nutrient breakdown (% & grams of Protein, Fats, Carbs). There's no "right" or "wrong", but rather just putting accurate numbers on what you're eating right now.
OTC Fat Burners
There are lots of ‘fat burners’ out there. Depending on how recently you’ve done a walk through a GNC, you may be more or less familiar with the different brands. It’s been a long time since I walked through a GNC so I am not up on the latest. You may need to experiment with different products to see which works best with your own body chemistry, and also keeping in mind things like can you take it on an empty stomach (e.g. if you’re thinking AM fasted cardio). Generally IMO it’s more important to find the one that allows you to function during your day and sleep at night, as opposed to worrying about getting tweaked out enough to “lose weight”.
Ephedrine
If you want to go back to basics, you can build your own ECA stack with individual components like NoDoze (classic college-finals week caffeine supplement), Ephedrine and aspirin (cheap off-brand is fine if you want to keep things cost-efficient).
Ephedrine Profile
Here are a couple articles on use of Ephedrine:
· “Efficacy and Safety of Ephedra and Ephedrine for Weight Loss and Athletic Performance”
· Efficacy of herbal ephedra-containing dietary supplements and ephedrine on weightloss
· Ephedra Side-effects
· Difference between Ephedra and Ephedrine (re: when Ephendrine was banned in the US)
To build your own stack:
· E/C: 1:10 ratio of ephedrine to caffeine. Typical is 25 mg ephedrine + 200-250 mg caffeine
· E/C/A: 1:10:10 – 1:10:15 ratios. Adding in aspirin thins your blood a little to extend the effect of the E/C. Recommendations for aspirin range from a baby aspirin (80 mg) to a regular aspirin (325 mg)
Another variation is ephedrine / caffeine / yohimbine HCl (ECY). Yohimbine is great as an appetite suppressant, but too much of it can leave you feeling sick to your stomach.
· E/C/Y: 25 mg ephedrine + 200-250 mg caffeine + 5 mg yohimbine..
You can take any of these combinations at 2-3 times / day, but it is generally recommended to not take anything after 3 pm, or determine how late into the day the last dose affects you, and make that the latest time of your last dose so you can sleep. Anything that affects your sleep will reduce your quality recovery time and begin to negate any progress you make from the compound you’re taking.