thongs

I tried wearing a thong for the first time yesterday. It was SO uncomfortable. Not only did it ride up my ass, but my entire labia majora was hanging out. How do girls do that? You may as well not wear underwear! I could also feel the seam of my pants through it. I normally wear a panty liner with all of my underwear, because the feeling of my pants through my underwear hurts so bad. I couldn't do this with the thong. By the end of the day, my entire vagina area was so red and hurt so bad. Anyone have any advice? I want to wear cute underwear for my boyfriend and so I can stop feeling insecure around my friends, but I just can't