Ya it happens,
It's better if you prepare homemade cerlac at home...
Once you Google as mylittlemoppet or gkfooddiary,it has many healthy porridges, foodcharts for your baby based on baby's age,jus have look...

Hello

Burp the baby after every feed.
You can also massage the baby's tummy lightly to improve passing gas.

Hello

Is it prescribed to you by your doctor?

Check once if your baby has any fever,cold cough and may be with teething too...

Try to give atleast fruit purees, porridges...
If your baby is not ready to eat,once you check with your Paediatrician,they will suggest you...

It goes off may be by 5th month. Even my son's bcg injected area had swelling but it went off later..

It's common while... Fever... Give sufficient breast milk..try to give food..ur baby likes.....

Consult once with your Paediatrician weather is not good...

Consult once again with your Paediatrician,they will advice you...

During fever or after fever,we itself doesn't show interest on foods,babies will take time...
But don't stop offering foods...

Give like some kitchidi,rasam rice,Sambar rice with less spice,and give idli or with idli make idli upma,give some veg soups...
If your Dr said to give fruits,
You can give fruits or fruit juices...

Baby will cry..and have thread like potty in liquid form numerous times