Low rising HCG

Ka

I need to vent and maybe get some feedback. I had my THIRD frozen transfer of 2 embryos on November 7th. On the 20th I went for my blood test and it came back positive but my hcg was only 27. I went in on the 22nd and it rose to 44. Today I went in (24th) and it only rose to 55. I’m so frustrated and so upset. I go back in on Tuesday for another beta hcg and ultrasound. I want to be hopeful that everything is fine and I’m just a person with slow rising HCG but I can’t shake the thought that this might just be a blighted Ovum. Thoughts? Encouragements?