I'm not pregnant!

Im not sure where else to put this as my original attempt ended up removed so I thought I'd ask here.

I (19F) have been in a relationship with my boyfriend (19M) for over a year and after a recent incident that you can read about in my post history (it's the latest one) have had a major pregnancy scare but luckily as the title says I'm not pregnant and am safe and currently still in a relationship with the same person. My only question is should I still get tested for STI's? I am my boyfriends first partner and have no reason to believe he is cheating or has cheated in the past and I fear that he will take offense to me going to get tested. Should I do it "just to be safe" or trust that everything is now fine. And if I do get tested should I tell him I am?