I'm 20, and I've tried tampons before with few issues. I prefer pads, but I've used tampons for days when I'll be swimming or something. Today I decided to try tampons again, and immediately after inserting it, I got a weird, nauseous feeling in my stomach that went away directly after taking the tampon out. I also got a strange pain in my vagina/lower pelvic area. Does anyone know why this could be?