I am 24 and my partner is 31, last year I stopped taking birth control completely after struggling to take it properly and having one too many pregnancy scares, fast forward to 4 months ago I decided to try and take the pill again but a month ago I fell really ill for 2 weeks so forgot to take my pill most of the time so we agreed that we would go back to using protection so from 27th September I stopped taking the pill, we had unprotected sex on the 29th September after a drunk night out, I try and track my cycle using Flo and according to the app I could have possibly ovulated on the 2nd or 3rd of October if the pill was out of my system and now I am 5 almost 6 days late on my period, I knew it would be a few days late but I normally have cramping around 2 days before and I am having no period symptoms, I am however having nausea on and off all day, my breasts are killing me and i am a little bit fatigued, is there a possibility that I am pregnant? I have taken several eBay pregnancy tests all were negative, what do we all think?