I think I'm just clutching at straws here. I am on cd27 of a (normally) 31 day cycle. This morning I had a bit of brown blood and thought AF had started, however I've had nothing more since then. Since lunchtime I've been crampy and had period pains in my back. Has anyone had an implantation bleed with period pains or are they normally painless? As I said I think I am just straw clutching and it is probably just my body playing tricks on me!