HCG levels

Yamil

Hi Ladies! Just wanted to hear feedback on my HCG levels. On Feb 8, I had a frozen embryo transfer with one 5 day blastocyst. Today, I am 4w5d. Just had my HCG tested on Tuesday and Thursday of this week and my levels were at 1764 and 4527, respectively. Kinda concerned about twins since there was a reason I only transferred one! Ha! Thoughts?