I really need some reassurance please - hcg numbers

I am worrying because I got my first 2 beta hcgs after my first successful IUI. I have many fertility issues and so I couldn't believe IUI actually worked for me and now I'm so worried I'm going to lose it. At 14 dpo my hcg was 101. Today at 16 dpo it is 187. It did not double in 48 hrs 😔 Please someone give me hope. Is there anyone out there with successful pregnancies that their hcg did not quite double in the 48 hr timeframe?

Thank you all so much