Pregnancy ?

Hbk

I’ve had 3 miscarriages. after all the sleepless nights, wondering why my body wasn’t good enough to create another child. months pass by then November comes I didn’t get my period? I took a pregnancy test, negative .. but why was I missing my period? then all the sudden I get my period but it’s brown & it only lasted for 4 days? I looked it up & it’s says pregnancy.. old blood.. or ovarie cysts. Has anybody ever experienced this?