pregnancy and weight loss

Jessie • Stay at home Mom to a wonderful daughter. Married to my best friend. After 4 years TTC 4 rounds of IVF proud twin boy mama. Loving life each day as it comes.
So we got out confirmed pregnancy our first beta level was 589. I am overweight and have been trying but with injections transfers I stopped my workout routine. I wanna stay healthy and do anything I can for a sticky baby. Advise ?