Pain in uterus (i think)

Hi everyone!

So lately whenever I have been madturbating and putting something inside me, theres this one spot that feels really uncomfy if i push it. I have just thought that its not a big deal, but today when i had sex we noticed after that a red climp came outside of me. Now my hymen has for sure broken years ago, so it cant be that, we also used lube and at no point was i in pain, so a wound wouldnt make sense either. Also i wasnt bleeding, it was just a climp?!? But now after the same spot thats hurt before when i have pushed it is hurting allthe time?! The spot is in the right of the uterus. Does someone have any clue what this could be?! Also idk if this is important but bc of my vacation i skipped my periods (im on the pill), so could the climo be just some overflo?