agr aapne solid start kiye hai to ho skta hai, but aap usse boiled veggies and fruits ki puree khila skti hai jo digest krni easy ho, abhi semi- solid chlna chahiye. solid food and bahar ka khana aap 9 months ki age se start kr skti hai.

and apne next doctor visit pe unse bhi baat kre taaki agr koi aur reason ho to pta chl jaaye

Hi no don't give that daily give it in emergency, hold baby vertically after every feed and position properly to the breast so as to avoid air ingestion while feeding which is the most imp cause of colic pain and gases and fuzziness

Apple, boil n give
Banana
Dal
Ghee roti
Ghee Rice
Dont give cerelac, salt n sugar till 1yr.

Hi no give only breastmilk exclusively till age of six months after that u can give formula milk and semisolid food both along with breastmilk

S u can give cow milk

Medicine sahi hai.. Combination of folic and vitamin.... Tum ghar ka khaana proper khao... Koi aisi ek cheez nahi hai jo bachche ka weight gain kare.. Sab healthy item khao...
Aur abhi 4 months baaki hain.. Kabhi kabhi babies 7 months se weight pick up karne lagte hain.... Still aap gynaec ko poocho.. Unse better aapko aur koi guide nahi kar sakte hain...

Hi no you can give suji, it's not due to that

At least 75 ml to 100 ml

What is the age of baby?

Upto six months breastfeeding only recommended for babies...
After that you can start giving semi-solid foods along with bm or fm...

Initially start with dal water,rice water,fruit purees, porridges...