as everyone else stated your too young. and you obviously did NOT do any research into The One. If you did you would have known about supporting supps and where to get them (meaning NOT gnc).
LMFAO at trying to stop a cycle midway just to drink. LMFAO. if your concerend that much about drinking while on a cycle you should NOT be on the cycle. For example: if you were on TRT or (to make it easier for a noob) if you were fuking ur chick, would you stop halfway thru bc...lets say....bc ur hungry? no. you finish what you are doing. THEN you go eat. Also, since your underage even tho your 20, still young, you should not be taking them. However you started, and i believe you said you have been on for half the cycle or 17days? the damage is done already :/ so you might as well finish off the cycle for the best gains. but i HIGHLY recommend the proper pct for The One, and get blood work done.
another thing. why do you want to be drinking? i BELIEVE drinking stalls the healing of protien synthesis. (someone correct me if im wrong). Also, damages your liver, and being on an oral cycle, your liver is stressing out enough.
after pct and blood work. just train and diet hard. if ur trying to bulk add on calories proteins and carbs. If you NEED supplements add in some whey protein (cant beat WHEY), and possibly some creatine mono.