Today I am on the 2nd day of my period and I thought I will try to use a tampon of regular absorbency. I pushed it in without the plastic applicator, and it went all the way in till the end. When I bent down to pickup something, it hurt a little as well as when I sat down on bed. I did not feel nausea or anything immediately but in 5 minutes I was feeling like fainting and throwing up. I almost passed out. What happened exactly? What is TSS? I have never used a tampon ever