Forgot about a tampon. On what!

Hi. I have rather an awkward question. After a few weeks of unreasonably painful sexual experiences, I walked into the bathroom yesterday and it stroke me.. I reached and checked for my fear to come true - there was a tampon in my vagina. I'm a dancer, and a few weeks ago I used one while not on my period, just to prevent any possible awkward situation, then got home late, fell asleep and apparently - just forgot about it. Yesterday, when I took it out, I could literally feel blood going to my ovaries, like it goes in a leg one's been sitting on. Today's morning I found out I'm bleeding. It's just a day or two before my period, and now I'm concerned, because it's not clear if it's my actual period or I traumatized my vagina and it's bleeding. I don't think I had any symptoms of TSS, but I did notice being tired and sleepy lately, as well as slight occasional headaches from bright light and need to pee more then usually. I'm concerned, as there's not really that much information on what