STD Screening - how SHOULD I feel?

I recently got a text from an Anonymous STD hotline saying that a recent sexual partner of mine just tested positive for an STD and recommended that I get checked.

I already schedule an appointment for Monday at Planned Parenthood...is it bad that I’m not panicking? How SHOULD I be feeling?

I have had unprotected sex within the past couple of months with 3 different guys (I know, not very smart, I beat myself up about it). I have not had any unusual symptoms or anything out of the ordinary go on, but i know i can’t bank on that. I just have hope that IF I do have anything it can be treated. Any words of advice?