Std scare..plz help😥

Im really scared I think my ex gave me an std a couple months ago because I've been have vagina problems. I'm 15 years old and I can't tell my mom and I don't have anyone to take me to a clinic unless I sneak out at night but then they are all closed. I really don't have anyone to turn to and I can't live with this until I'm 18. Plz help😥