* HELLA GRAPHIC * help?

So I just ended my period like 2 days ago, and I’m not 101% sure but I felt slight pain when putting in my tampons sometimes but I really feel like it’s because of the tampon applicator that’s sharp, since it’s my first time ever using these new brand tampons. Anyways, just masturbated and after-while I started feeling a kind of rubbing pain as if I were dry (but I wasn’t) where the pain used to be with the tampons (it’s not a pain that’s deep in my vagina, it’s actually right in the entrance, yet still not outside). Then I see my vagina and one side is swelled. The swelled part doesn’t hurt, and the inside of my vagina doesn’t hurt, it just kinda feels as if I had been fingering my vagina while dry. Is this from the tampons? Something else? Sos 😭