My cycle is normally 23/26 days long. Have been for as long as I can remember. I'm now on cycle day 28. I took a test on cycle day 25 and was as negative as can get. I'm late on my period. I've had cramping alot and sore boobs but that's completely normal for me and I feel as though I'm going to come on. The only difference this month was i had a tiny bit of blood in my underwear about a week ago. Debating weather to go and buy another test or just to wait and see if AF shows as I've had a negative test 3 days ago.