the pill and sex

I have been on my pill for over a year, i had been with someone for 2 years and we never used a condom when i was on my pill but he always pulled out and only cummed in me once. We split and now i have a new partner (i aint going into details but trust it wasnt straight after) anyway now he pulls out too but the other night he said he cummed a little inside me and then stopped himself. Now i dont know why but now im worried i might be pregnant. I havent missed any pills and i always take them on time, but some reason i am worried and i reckon its cos im with someone new, what do you lot think cos i need some reassurance