Please answer?

I've never had an std. But apparently my boyfriend got it from an ex and we've been together since October. I am now 14 weeks pregnant and my doctor just not notified me I have gotten chlamydia from a test taken on January 8th! This makes me furious that he is just now telling me two months later. Neither of us have slept with anyone else so it had to have been his ex. She's really gross. But aside that, we take showers together and such. He can't get treated until Monday and I've already taken my dose. They told me no sexual contact for a week after I take it. That's fine, but I've read articles and it's from oral, anal, and from sex. What about just touching? We take showers together. And sometimes we touch each other with our hands. I'm just curious on what all I need to avoid. Help please?