I have a question!

Okay here goes: so I've been on the pill for about four months and sometimes my boyfriend finishes in me (yes, I know we're not really supposed to do that). So if I got off my period one day and then that night started my next set of pills, was it "safe" that the day after my first pill of the month he came in me? Sorry if this is confusing, but that's why I'm asking here and not looking it up because I don't know how I would phrase this on Google.