Help no period

Lori

Hi I have pcos and for last two months my period been coming on its own. This month it didn’t come yet I’m three days late. Yes we are trying for a baby and my beasts been hurting a bit on and off. I don’t know if it pcos or pregnancy what should I do. I’m scared to test cuz we been trying for 3years and plus I wanna do my HSG test but can’t do it till my monthly comes. Someone help how do I know it’s pcos or pregnancy.