I got "ate out" for the first time?

I'm 17 and my mom has always told me if I got sexually active to tell her and I would get on birth control, etc etc. I haven't had actual "sex" but I received oral for the first time yesterday. My boyfriend isn't the "player" type and he is a really good guy. but I'm still afraid if I could have gotten an STD from oral? I just want to be safe about this, and sometimes I'm just too cautious but I'd rather be that, then not care at all. My bf said he doesn't have any diseases or anything like that, but should I still go get tested incase? Because if he has gave oral in the past to someone else cant that pass on? How could I talk to my mom about this without it being awkward?!