I am 40 and have been feeling nauseous the last few days, no missed period but I feel a flutter in my belly. My periods the last few months have been longer (8 days) and more frequent, eg every 24 to 26 days but lighter bleeding. Except for one that was 34 days. I m not too concerned about nauseous feeling as I didn t vomit for first 2 pregnancies and a few days ago my son and step son both had gastro. My belly appears more swollen though but I do suffer from IBS. Not sure if I should have a pregnancy test as I haven t actually missed a period.