HCG staying the same?😕

Breann❤️ • TTC #1 with fibroids and after two laps. First round of IVF successful now expecting twins!
I had a positive home test at 12dpo and blood hcg was 118 at 13dpo. I had it tested again at 16 dpo and it had dropped to 114. I went for a third test at 20 dpo and it was 114 again. I have to go again tomorrow. Anyone had this happen? What was the outcome?