Confused? Has anyone had this while ttc?

I started af on Wednesday and I was crushed. It was just a little blood and very dark brown. Then Thursday and Friday it was heavier and I had some dark brown mixed with bright red. Sorry if this is tmi but it has filled 2 pads (I have been keeping track) about halfway each. Then I just took my bbt this morning and I have a temperature spike?? I am not sick.. I can't possibly be ovulating.. Any one else know what is going on??