Talk to Pediatrician on Motor Delayed Milestones

Mera bacha aik sal ka hochuka hai magar wo ab tak beth nahi pata maine bht se paeds k docs ko dikha chuka hn LDH , CPK , Vitamin D , CBC , TSH , Urine Dr ye sb kra chuka hn har cheexe normal hai around 8 months age p uska weight 8.5 kg tha mgr ab aik sal p uska weight 6.5 kg hogya hai uske dant achuke hain mgr weight bht drop hua hai neuro ko b dikha chuke unhne NOLBQ drops die hain bs or physiotherapy b krwai hai but koi khas faida nhi hua physiotherapist ka kehna hai kuch reflexes positive hain ab tk and muscles weakness hai, i dont know k ab kia kya jae lactoless milk k ilawa koi b milk dedo vomits krne lag jata hai sirf yahi milk pi pata hai, if anyone can help in this case or suggest me a proper solution JazakAllah in advance for that