I screwed up

Okay so Saturday I was a party and went home with a guy I have known for awhile. Obviously we slept together. The sex was good, but really rough, leading me to think that's the reason for me being so sore, like my inner thighs hurt along with my vagina. I also have a sore throat. If you don't already know these are signs of HIV. 
Normally this wouldn't freak me out but, the guy I slept with has been with 100+ girls. He told me he was clean(recently joined the army also) and I trust him but I think I'm freaking out for no reason. I asked my mom to make me an appointment to get tested but what will I do if I actually have something?! I really just needed to get that off my chest.