My fiance' lied to me about doing steroids?!?!?

I am 5 months pregnant with my fiance' and I's second child. Anyway, he talked to me about wanting to get steroids to get more muscular at the gym. I told him that it would hurt me and I would prefer him not to, but if he decided to do it to be honest with me about it. Well, he started doing steroids in a dropper that you mix with a drink. Which, I knew about. I am not happy about it, but atleast he wasnt lying. Well, while laying in bed, I found a cap to a needle. I knew already what it was, but gave him his chance to come clean. When I asked him about it, he acted as clueless as me about it. Well, when he went to work, i I snooped and found his stash of needles and steroids. I was so hurt that he lied to my face about it. He tried to turn it around on me getting mad for snooping through his stuff and that if he told me, I would overreact. If he would be honest with me, I wouldnt HAVE to snoop. I am so hurt by this and dont know what to do.. He said he was turning his phone off and told me to have a nice night.. I am so hurt that he lied to my face. Makes me wonder what else he lies about..