Pregnant? Miscarriage? Period?

My husband and I decided to start trying for baby no.2. My expected period was 11th December (yesterday) but I took at pregnancy test on that day as I was feeling a bit off and thought I was pregnant. The test came back positive. Then this morning I was getting cramps and started bleeding red blood. I thought I might have gotten a false positive so I took another test and it came back positive but the line was very faint. I took a clear blue digital one and it said not pregnant. I am still bleeding but with clots now. Am I on my period or having a miscarriage or what? I’m so confused and actually feel like I’m losing my mind!