What is going on!

Louise

Miscarried dec 2020 into jan 2021. Took a preg test about a week after and neg. Ovulated two weeks after Miscarriage so we tried again. I tested 2 days before missed period and looked like a pos. Took one the next day and was neg, and seemed to have some very very light, brown spotting. Missed yesterday which was my period due date. And took a test today and positive again today but still have the brownish discharge. Is this a chemical? Miscarriage again. So confused. Anyone else had this before ? X