Pregnant or not?

I stopped taking birth control and got my period (heavier than usual and more cramps than usual). Now I'm waiting around and my boobs are really tender and I'm moody. It's the first month after birth control and I'm just not sure if this is what happens or if these are the inklings of pregnancy. I'm not even sure when I ovulate because of pcos making me irregular so I'm not sure when I should test!! Any one have any light on how they felt the first 30 days off their birth control? Are these pregnancy feelings happening or what?!?