Serious Question Guys!!!

I have been trying to conceive for about 2 years now with my fiancé. I’ve gotten pregnant about twice before but both miscarriages, sadly. My last period as of now ended December 15th and started on the 10th. I just went to the emergency room and they told me that my hgc levels are too low, that I was measuring about 5 weeks and now they want me to schedule another appointment to check my levels 2 to 3 days from now.. has anyone gone through this and can give me any advice? I’m super worried and sad.