Attacking wedgie

17, F.

Recently, I have been having an issue where I've been getting wedgies constantly. I was not one to get wedgies at all until the last few weeks, and I find it annoying. I have a small behind.

At first I thought it was the underwear being too low, so I was pulling them higher. Didn't work.

Tried to go with just pants. My behind vacuumed the pants and my shirt in, which resulted in an embarrassing situation in public.

The only thing that I can say has been different is the hiking and basketball I've been doing more frequently, if that's of any use.

At this point, I don't know what could be causing such a thing. What can I do about it?