my pill and plan b used in conjunction?

I have recently started gildess fe 120 and am on my second month. I was previously on tri sprintec and went straight to the new pills. My first month didn't have any problems. I started my second pack and I think I ovulated on this pill (I have been taking them at the same time every day and have not missed one pill). I had some bleeding/spotting which I assume was ovulation bleeding. I had sex on the day I think I ovulated (the third of June) and I took plan b 12 hours after we had sex. I was wondering what my chances of ovulation were? I was also wondering if I were to ovulate what my chances of pregnancy were with my pill and plan b used in conjunction.

I should also mention that I have been spotting since June 5th and started getting cramps tonight. I'm just really nervous and would feel better if I knew how likely it was that I was in fact pregnant.