Male Baldness Info

I was looking at steroids over the web because I was just curious and I was reading some of the effects. A lot of the effects of steroid use I already have, so then I looked as to why. I think its because I am producing a lot of testosterone. I have been getting a lot of acne all over my body for the past year, male pattern baldness is setting in(and im only 18), when I work out I notice that I gain a LOT of muscle extremely fast. I mean after one workout my arm muscles seem to take on the look of someone that has been working out for weeks upon weeks. Is there any health concerns I should be on the lookout for this and should I get tested