I feel like as soon as I write this I'll get my period and can quit wondering.

So I should have started Monday. Every other period I am a day or two late, no big deal. Started after my second kiddo. Well it's now Thursday. I had slight cramping Monday and Tuesday which normally goes along with day 1 and 2 of bleeding. Took a test yesterday and BFN. I wouldn't mind to be pregnant again, but wouldnt it have showed on that test? Should I try another one tomorrow?