My periods have been late before. I would usually get them every 24 days and then there were times when it would happen every 30 to 36 days. It's been 35 days since my last cycle. I have had slight cramping a few days back and very light spotting. Now my breast are really tender and I'm waiting for my cycle to come on. I took two tests both said negative. I think I am a bit dehydrated so maybe that is affecting my cycle,but that doesn't explain the tender breast. Can someone help me please?