Losing Weight And Lack Of Sleep. Please Help!

My son is turning 6 mos in 10 days, he is EBF and Unlilatch, first 3 months niya hindi naman ganun kataba pero malaman siya, Umiinom ako ng Prenagen Lacta Mom for BM boost. Nag try ako nang iba Mother Nurture 7 in 1 Choco Mix, I noticed na biglang pumayat baby ko. I've been eating a lot of greens, meat and dairy parang hindi naman nataba si baby. Ano po pwede kong gawin? And also paano pong baguhin yung sleeping habits ni baby. 4am or 5am na siya nakakatulog. Any suggestions po? Salamat sa sa sagot po!