You're already pretty strong for your age and bodyweight. As young as you are, if you're going to continue powerlifting, you should definitely expect to go up weight classes the next few years. If you can maintain ~120lbs til your meet, you could probably drop ~5lbs of water weight for weigh in and not have to lose any actual weight.
I'll wait a little to see what you're currently doing as far as training before I offer any advice. I'm not familiar with Smolov, but googled it a bit and read a little about it. To me, I'm a little skeptical. A program that advises squatting more than 2x a week doesn't make much sense to me, especially for a drug free lifter. If you have knowledgeable people around you/coaching you as far as getting ready for your meet, I don't want to override them. As far as squat training goes to me, it makes more sense to do one speed day (working on explosiveness and form), or rep day (vary it), and one heavy day a week.
Generally, the way myself and a lot of powerlifters train is 2 days a week for speed and/or assistance work for squat/deadlift and bench, and 2 days a week heavy training for squat/deadlift and bench. You can check my journal for how my training looks if you want. I won't deadlift heavy usually more than 2 weeks in a row, but being young you're probably ok to deadlift once a week as long as you're not maxing out every single week.