STD?!

I will try to make this is as short and not complicated as possible. So I'm 19 and have been with my boyfriend for 7 months now. I was his first & I took his virginity while I had been with a handful of guys in my past. Well one of these guys was a ONE time thing, later from a friend of a friend I had heard he had herpes and gave it to someone else. She said I should get checked out this was two years ago, I was always to scared because I didn't want that to be reality so I never got tested. Well In the back of my mind I always thought i had it, well my boyfriend and I used condoms for months and then one day we realized it's better without, STUPID. Because the other day he ate my out and got sores in his mouth and this happened before previously and I was like fuck I think it's time to tell someone. So I told him & I feel like complete shit, I'm depressed, I feel he deserves someone so much better then me. & I made an appointment to get tested but it's not for a couple of weeks and I'm so scared because I'm 90% sure I will have an STD. I don't have any sores but my discharge smells fishy sometimes, but does anybody have any advice on how to not stress about this?