Delayed growth?

Rosey🤙💅

My son turned 7 in April. He lost his first tooth last month, He is very skinny. He weighs 53 lbs. He has diagnosed migranes, I took him to a neurologist hrs away. He has bad vision in one eye which could cause his migranes, I'm also noticing some stomach issues. He has been to specialist. He regularly sees his pediatrician. I just feel like he's so much smaller then others his age, and his sister lost teeth alot earlier and never had any other problems. How old was your child when they lost their first tooth? Does 53 lbs seem like a low weight for a 7 year old male?

His Dr never says anything seems alarming but I know medically things can be over looked, I guess I'm just a worried mom. 🤷