It's a sad thing that other people were willing to take risks with your long term health, especially a gym coach with no medical training. That's someone who was just out to make money out of you. Short term gains but by the time the serious things like kidney damage and heart disease manifest themselves, your coach will be long gone. When you see the number of guys from the wrestling fraternity that pumped themselves with steroids, who are now dead or have had strokes or heart attacks, you would think that people would make more of an effort to gain the bulk the hard way. Guys in their 20's don't think that far ahead as to how their body will rebel in their 50's and 60's. I truly hope, for your sake, that the side effects are minimal.