I first got my period when I was 12, and I tried using tampons several times. The first time I used one I got very dizzy, started having cold sweats, and went right back to the bathroom to take it out. The most recent time I tried using one was a year and a half ago. Thankfully my bestfriend was in the bathroom with me getting dressed. But I put a tampon in and felt dizzy so I took it out and apparently collapsed into the floor and my friend finally was able to woke me up. I had cold sweats and ever since I've gotten hot flashes. I have followed all the instructions. What could be wrong?