I don’t know what this bump is in my vagina!!

Okay so I was doing my weekly/bi-weekly inspection of my vagina, and there’s this yellowish bump just at the opening, like in actually in my vagina, I think at the hymen? I spread the two lips apart and it’s there! It hasn’t been there before I’m really scared, I just started new birth control 3 weeks ago, same type just different brand, I haven’t had sex in over 2 months and none unprotected sex either. What could it be? Should I go to a doctor?