I haven't gotten my period in 3 years and I don't know why

I know I'm not pregnant and I don't know if my PCOS has anything to do with this

Have you seen a doctor? We can't diagnose you over the internet.

I haven't seen a doctor in about 2 yrs because I didn't have medical insurance

Unfortunately, we cannot diagnose you over the internet. You will have to have some blood tests done to determine your hormone levels.