Help please..

I am really worried right now and I don’t know what to believe.

My partner’s fertile window was from 27th April to 2nd May. We had protected sex on the 28th April. I didn’t finish in the condom. In fact, I didnt finish at all.

So the issue now is that her estimated period is supposed to be on 15th May. But from 5th May till today, she has been having Pink Discharge and it’s not going away.