Debating getting an IUD

Chloe
I know I don't want kids for ~10 years (I'm 19 now). I'm currently on the pill and gave been for years. I hate how they make me feel sometimes so getting an IUD that lasts pretty long sounds good. Do you ladies have any input, advice, or warnings on this?
Not sure if it matters but I am not a virgin but I've never been pregnant. 
Also, I have PCOS so if anyone out there can give me some insight on how it will effect that it would be greatly appreciated!