Baby measuring big

Shayla

Baby is measuring big for 29weeks he is 3lb 65% bigger then other babys at that stage i have only gained 15 within 7months thats not alot is this normal is he just a big baby or am i further along than my due date

I had this problem with my first son i gained 35lb with him but he was measuring big cause i was 2weeks off my due date i don't see why this baby is so big