I came off the pill in June and my periods have been irregular since. I have had a 33 day cycle and a 44 day cycle, average being 39 days. My lmp was 11th September, ending on the 16th. I had sex on the 16th, 27th and yesterday which was 2nd October. If I was pregnant would it show up on a test by now from the other occasions? According to my app my period isn't due for another 17 days but like I said it has been irregular since coming off the pill.