Please help.

Saturday night my S/O and I had unprotected sex and he did "finish" in me. On Monday I had a clear and sticky discharge but my fertile window is not supposed to be for another 12 days according to <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a>, could I have ovulated early? And is there a chance that I could get pregnant from it?