Miscarriage

I started spotting 4 days before missed period(light pink). On the day of missed period, I started spotting pink again, the next day was pink as well. 3-5 day of spotting was brown. 6th day was bleeding, 7th clotting, 8th bleeding(currently on 8th day). I had a blood test yesterday, and they called back today to tell me I’m pregnant but my HCG levels are low(14)— they said ont he first week, your levels shoot up to 1400. They expect my levels to drop by Monday, making it an unviable pregnancy(chemical preg). I’m super bummed! Has anyone else had this happen?