tunnels keep falling out

It’s been 2 weeks since i stretched my ears, from 12g to 10g. it was a painless, smooth stretch and had no issues at all. i try to leave it as long as possible, but every time i end up feeling like i need to stretch after like 2-3 weeks because my tunnels start falling out, and after like a week the backing starts to go through my ear, not as if its swollen but as if my ear can fit the backing if that makes sense. (my tunnels have o-rings) are my ears just really easy to stretch or something? i dont wanna do it too fast and get butthole ears but i keep feeling like i have no choice😭