Advice

AF last month came on Feb 3 and lasted until the 7th which is pretty normal for me. AF came on Feb 26 and last until march 1 but was extremely light. Color was kinda normal with a little brownish tint. I've been getting dizzy, nausea, increased appetite and for some reason bled today. It was only 1 time when I wiped and was dark burgundy. I've taken 2 hpt and 2 BFN! Should I call the doctor? I had no implantation bleeding with my miscarriage or 2nd pregnancy. I'm really confused and not sure what's going on with my cycle. I had my son by c section on Nov 7, 2014 due to placenta abruption. He was stillborn. My cycle has been completely normal since December, 28 days like clock work. Any advice?