Need advice

Hey everyone. I had a miscarriage in nov. I have had 2 periods since then. My last period was feb 22nd-27. My husband and I had sex on the 28th. March 10-16 is suppose to be when I ovulate. On March 6 through now I currently have brown blood when I wipe. We wanted to wait one more month so that with my husbands retail schedule we were not expecting a baby during his black out vacation time. Any ideas on this brown blood?