Light headed after pin

So I've been pinning test cyp for just about 2 weeks so 4 pins so far and I am pinning my quad it's not bad when I'm putting the needle in or even when I'm injecting the gear. But once I pull the needle out about 15 seconds later I get all light headed like a crazy cigarette buzz could it be the gear or just a crazy adrenalin rush because I have never given myself injections until this cycle. Vets will you shine some light on this issue.

Hit a vein...do you aspirate? Meaning while pin is in the muscle draw back to see if their is blood?

Ya I aspirated all bubbles every time zero blood

Just sounds normal to me. I am afraid of needles, and I did the same thing on the first couple pins. After awhile I finally got a bit better but still is unsettling when injecting.

Ya I think that is what it is I'm glad that I'm just not alone haha