heavy spotting almost like AF.

To make the issue long short. I'm doing BBT and ovulation test. I'm regular with my AF, and regular, as well, ovulating. I have my lh surge positive monday night and positive the 2 times I test yesterday. We are triying to conceive. Today, no Lh surge and my temp went sky rocket meaning I indeed ovulate yesterday. my concern is that I'm having a really heavy spooting today. I always spot a bit before or after ovulation but today is so heavy like first day of AF kind of thing and very first time something like this happen. Anyone have anything like it before? any inputs I would appreciate it.