trying to conceive

Catherine

can someone help me, my husband and I are trying to start our own little family. i thought I was due on 31st January so I took a pregnancy test this morning with a BFN but I have had spotting, sore breasts and cramping, but I have just realised my last Menstrual cycle lasted 42 days not 31 and that I ended up ovalating around the time I thought I would be about to have AF so does this mean I go with a cycle of 31 or 42? glow seems to be predicting my cycle will be 31 but I am unsure. please advise 😀 x