Should I be Worried?

Hey I thought I'd get some second opinions on here because I can't talk to my mom about this. I am on the pill and have never missed a pill but I have taken a few late, at the latest 4 hours late. My boyfriend and I use condoms every time we have sex and have never felt one break. However, i have read online that they can break without you knowing.

The past few days I have had some stomach pains and a few days ago I was feeling very bloated. I have not thrown up but did feel some mild pain and nausea after taking my pill yesterday. I have not had any breast tenderness or any other symptoms. My period isnt due for about 12 days but i thought id ask anyway...Is there a big chance im pregnant?