Got a call from the nurse today and she said my betas were good. she said the doctor wants me to…

Got a call from the nurse today and she said my betas were good. she said the doctor wants me to come in again tomorrow for another blood draw. When I asked her why and she said to see if they are double like they should which is every other day. Tomorrow I am going to ask what my numbers were. I am still curious about the possibility of twins.