Sex forced to stop taking bc

Okay so around the end of last month I was forced to stop taking my birth control because of two reasons one I kept forgetting and two my insurance ran out well I'm due for my period on the 26th and I just slept with a guy tonight actually and both him and I are allergic to spermacide so we didn't use a condom and he didn't pull out, I'm just curious about the possibility of me conceiving a child, should I be worried ;/