Should I go get tested?🤷🏻‍♀️

Soo I just recently lost my virginity to my boyfriend and every time we’ve had sex he’s always came in me (he doesn’t like to pull out and I’m on birth control) but we’ve never really talked about getting tested for any type of diseases or anything. So my question is

1 how do I approach him on the subject

2 how often should we get tested?

(Yes we are both of age)