cut a long story short, been off pill 5 months and have come on days 28,33,30,28. Yesterday would be day 28. I havent come on and been having quite bad period pain type cramps and also when i get up too fast or turn round too quick it feels like im pulling a muscle very low down (womb area?) or a bit like a stitch. I did a hpt sunday and was bfn. Am i now a day late? Or can i not class being late until sat which would be day 33 (latest ive come on) I dont know when im 'supposed' to have come on???