Most women only have 2-3 days where conception is likely, which is why some couples end up using charts and ovulation tests​ ect to pinpoint the most fertile point so fingers crossed the odds are in your favour.

Also bear in mind that stress can really affect your monthly cycle so that your current situation which I assume is really causing you a great deal of stress could actually delay you period etc so easier said that done try not to get worked up about things. I had a pregnancy scare in my early twenties that still haunts me and I really wouldn't want you to experience similar so here is my story..... I was worried and like yourself was very aware when my next period should arrive I decided that I would buy a test that could be done a day or so before my period was due and to my horror it came back positive. Terrified and​ fair to say hysterical I headed out to buy more tests, thankfully I bought a different brand and when I took the new test it was negative. What I hadn't realised is that for some home pregnancy tests the hormone change that happens a day or so before you get your period can confuse the test and you can get a false reading.

Don't forget there is always support available at pc, take care.