Lump inside vagina?

Obviously you guys aren’t doctors and I do have an appointment, in three weeks. I’m so anxious. Anyways, I found a small lump ,like pea sized and it’s hard and red,inside my vagina and the only reason I’m worried is because for the past 5 months I’ve had irregular periods, 3 of those were missed, I spotted lightly for atleast 15 days in those months I missed my periods. I also have skin tag like mole on my vagina that disappears and reappears in the same spot. Has anyone experienced this and everything came out okay? (It’s definitely not part of my vagina)