weight gain...

Abby • 33 years old. Married to Eric. Mom to 2 boys that are 3 years old and one year old!
Okay ladies I have a question when someone says how much have you gained do you go by your prepregancy weight or your first prenatal visit? I'm having a hard time because I found out dec 18 and put on 3.5 pounds from the holidays compared to my five week prenatal visit. So do I count that extra 3 pounds or do I just count my weight from my prenatal visit? Thank you 😊