Chemical pregnancy? Miscarriage?

So I took a clear blue and got a faint positive as well as on 2 cheap brands. Yesterday I brought another 2 and they came back negative. I done a cheap test again today (fmu) and got a negative... I brought another about a hour ago as I experienced pink discharge when I wiped. 30 mins later when I got home I went for a wee and again I had blood like discharge but pinkish/Orange like and a few wipes worth. I accidentally got pee on the stick where the lines go and now there’s a weird mark where the “test” line would be... I had a still born in June and my HCG went back to normal within 2 weeks and had 2 periods both at a 31 day cycle so if I go by a 31 day cycle I should be due AF in 5 days, if I go by a 28 day cycle then I’m due in 2 days (Monday) Iv NEVER EVER bled before 28 day cycle. I’m so confused :(