heavy bleeding, threatened miscarriage

I had a chemical pregnancy in march at 5 weeks. I got pregnant again in April and started bleeding bright red blood at exactly 5 weeks again.... I knew I was miscarrying again. I went to the Er this time for levels. Didn't go last time. They said everything looked great. Closed cervix, no cramping, and hcg level of 135. Diagnosed with a threatened miscarriage and told me I have a 50/50 chance of miscarrying. I bled like a period for 3 days and last day was spotty. Bleeding went from bright red blood to dark red to bright red then spotting pinkish then stopped. They had me repeat levels in two days. This was a sat. Had to wait until today Monday for results. Which I had to call them Bc they hadn't called. I also wanted to ask why I still felt dizziness, now slight cramping after bleeding stopped, sore breasts and back ache. I said I do think I miscarried and was all this do to dropping hormones. She said my level went up from 135 to 245. She said everything looks great and to do another test in one week. I asked her why I would bleed like a period and she said it could be many reasons and sometimes they just don't know why. And some women bleed during pregnancy. Has this happened to anyone else? Would you be willing to share if you did end up having a health baby after a scare like this? Also did you find a reason for heavy bleeding like this? Did it continue or stop at some point in pregnancy. Sorry this really has me worried. I'll attach my line progression and my lines the days I was bleeding.... which the bleeding days lines seem to be lighter than my original line progression. But seem to get a little darker again for some reason. I also took a clearblue today after she told me I was still pregnant. I was shocked and didn't believe her or the tests lol.