Politics are often involved. Coaches get tipped off then warn the athlete. These guys often know days, if not weeks in advance of a drug test. If your one of the blessed you will be looked out for. If you one of the less unfortunate it could be a long suspension or your career.
AAS can stress the liver some and so can alcohol. No need to punish the liver by doing both. Its a bad idea. Hangovers, missed workouts, all bad for gains.
Sometimes liver stress can cause severe nausea. Do some blood work. It could be numerous things though. Food poisoning, stomach virus, food allergy, etc..
Its my belief that the average recreational bodybuilder has no business ever using insulin.
One screw up could kill you and I'm not over exaggerating by any means.
AROMASIN works best daily but you can get by with EOD dosing. I had tremendous succes with it at 25mg EOD. I'd say good starting point would be 12.5mg EOD or half that (6-7 mg) daily.