Has anyone dealt with testosterone?

Hey all! So my boyfriend is taking test supplements for bodybuilding. Basically he says there’s NO way at all for him to get me pregnant and I thought we had been trying (I was pissed when I found out) anyways. I’m three days late and i tooke a test my first late day, negative. Anyways. I’m usually never late and I never have boob pain, which they’re in in horrendous pain to where I can barely wear a bra or my seatbelt. Anyways. Just wondering if anyone knows anymore than I do on conceiving while taking test and if you have conceived ! Thanks!!!