Not gaining weight

Angelica β€’ Baby Boy born April 30th 2016 and Another Baby Boy due 08/08/18πŸ’™πŸ‘¨β€πŸ‘©β€πŸ‘¦β€πŸ‘¦
Im 14 weeks pregnant i started off 191.1 lbs but a week after being pregnant at my next appointment i was 187.0 lbs and have stayed that weight for 2 months now im concern that im not gaining any weight i dont have a baby bump well just a little more fatπŸ˜‚πŸ˜‚.. But im just concern about not gaining weightΒ