Pregnancy on the pill????

I need someone to answer this with honest answers and actually help me rather than comment unnecessary comments.

I lost my virginity 4 months ago...I'm on the combined pill, usually pretty good with taking my pills at the right time and every day.

I had sex the first time took my pill an hour late but got my period the next month and the month after that, 2 months...at the end of that i had sex on the last day of my 7 day break and he pulled out...it says I'm covered even on that week? I have had 2 periods since and they have all been normal and on time and not any lighter the same bleed heavy for a day then gets lighter

I've had stomach pains ever since loosing my virginity but I haven't had any other pregnancy symptoms apart from sore breasts every now and again.

Can someone please help me, could I be pregnant?