Fed up with feeding

KJ
My son is 11 months. He had tonsillitis and recovered..still he refusing his meals and milk. At times he has congested nose but before each meals and milk i clear them with saline drops. He is soo fussy. He used to have our type of meals and had a good appitite and also didnt trouble me with milk. He used to hild his bottle by himself and drink by himself. All upside down. I am so frustrated and all the pressure of mine goes to husband. I became so snappy. And we argue alot. What's happening! !!i thought by 1st birthday everything will be smooth. :(((