Idk what’s going on

The past couple days my vagina has been itching a bit and I’ve been feeling some pains. I also get paranoid and think I have an STD or something, but I just got tested and it was clean. I’ve been with my boyfriend for a year so it’s not like I’ve had any new sexual partners. Anyone have any similar issues? I also have an IUD but I’m not sure if that would make a difference