My cycle is regular and normally 32 days according to my tracking app. I am currently 4 days late and have been feeling a little nauseous all week. Thursday night I threw up and apart from the nausea felt fine and felt ok Friday morning apart from still a bit nauseous. I have also been a bit tired and snappy recently and strangely really burpy. I did a pregnancy test this morning and pretty sure it was negative, it was a cheapish one, don't know how much difference that makes, £3.50 for 2 from sainsburys.