Irregular periods & HPT.

So I have unusually weird periods that come some months and don't others. Usually they get up to 39 days apart, sometimes it's only 25. My fiancé and I had a condom fall off in me while he was ejaculating and we're now impatiently waiting to test. We had sex on 26 Sept. 35(ish) days later here we are, no period. I suppose my question is, when did you ladies test for pregnancy?!?! Irregular periods make it hard to know when one is missed.. I definitely have symptoms of pregnancy, but since idk when my period will come, they could be pre AF symptoms. Although they've lasted well over two weeks. Help!