4 months old viral fever. Troubling him.

My 4 months old baby is a gassy in general.. he got viral fever n giving him paracetamol since yesterday.. he is getting extremely fussy in the evening.. last night he refused breast n crying nonstop in closed eyes n his face color also turned blackish red.. I took him on shoulder n rocked him n he calm gown n burped n passed some gas n then he got back to normal.. after paracetamol his farting is increased. He even got some red heat boils kind near ears, head n one on lips.. today it looks reddishness reduced.. Is this normal behaviour when baby get such fever? Is they get more gassy when they are sick? He is on breast milk only.. can I give him mactose drops as I feel gas is troubling him.. ? Please advise