help??

My mom won’t let me go to the obgyn because she thinks I’m sexually active which i am but she would get mad if i was with my boyfriend. I had sex with 3 people. I’m 17. The 2nd guy i had sex with after we had sex there was a strong odor like in the air after having sex and we ended up breaking up and then my new boyfriend. He hasn’t said anything about the smell but i don’t smell it as much but i have a fishy smell kinda and I’m thinking i have bv but my mom won’t let me go to the obgyn and i really wanna go but I’m not sure if i can go unless my mom is with me ? Help please. I have bought monostait shit and t didn’t work and I’m using this other stuff for odor that was $20 and that isn’t working either. Please help?? Can i go to the doctor or without her?