honestly bro, I think you should keep up the hard work and introduce an over-the-counter thermogenic before turning to pro hormones or any other alternatives. You're only 20, if you dedicate yourself to proper diet, proper lifting and proper supplementation you can achieve great results. Taking the "fast way out" just isnt the way to go.
BUT with that being said...I am a fan of Body Image Nutritions Winnivar Xtreme. But, especially taking your size into consideration, you really want to be strict on your diet and cardio while taking anabolics so you just dont bloat up. You want to treat a pro-hormone just like you would an AAS. This means taking the proper OCT and PCT protocols.