Vent away @Sunny but don't give up ...
I had awful bleeding at 5w and my prog was very low - went in and had a BT and it came back as 15. FN and FS both said to prepare myself that it may not be viable. I had more bleeding 2 days later, then things turned around and haven't had any problems. My prog last time we checked was still low (32). Had my 7w scan on Xmas eve and have another next week.
I know it's really tough but hang in there.
Can you get in for a BT to see what your levels are??
My HCG was always doubling as normal and it was just the prog that was off.