I am 2 weeks and 2 days passed my period . My periods have been coming regular for about 4 months now, and this is odd. Went to the doctor and did a UA, came back negative for pregnancy. He thinks this may change by Friday this week.. is that even possible ? Or should I just buy an at home test?! And what test works the best and is the most accurate ??

P.s. I went to the doc in the first place because I've been throwing up every night and morning ! Also having severe stomach cramps :( any help would be awesome .