This girl i know and I have been hooking up lately and there were 3 or 4 times when we had unprotected sex (no condom). I am an over thinker by nature so now I am freaking out about having STIs so i signed up to get tested next week.

For context I have known this girl for almost 2 years and we have recently developed feelings for each other and decided to pursue a relationship. But because things sort of moved very fast we didnt really have a discussion about sex safety and ended up having sex with no condom. How can delicately tell this girl that if she wants us to continue having sex that i want her to get tested too? Is there a scenario in which she gets hurt by this request and say something like "do you not trust me?" or am i once again overthinking things...? :)

More context, i know i was STI free before sleeping with her as I got tested a few months ago and she is the only person i had been with since then.

Edit: clarifying that i was STI free before