Help!! Screaming during feeding...

Why does my 11 week old scream during some of the evening bottles?? She is formula fed. On to tge second container of a new formula. Similac sensitive pro. Normally she eats just fine during the day but when I get her home its a different story. Its not even every night. I know she is hungry. She has AR but controlled with meds. I thought maybe her throat was sore, its cold season after all and she is in daycare. Ive tried gas drops and gripe water in case she's gassy. She takes the gerber colic drops... I'm just so sad that i cant figure it out. I freaking forgot to ask if she pooped today at daycare... maybe her tummy? I don't think that it's colic because with some time i can soothe her and she's calm. She isn't eating as much as she used to, between a half to a full oz less. She is suckingon her hands a ton but doesnt seemto be drooling to consider it early teething. This moment is making miss my mom terribly. I wish she were still alive so i could call and ask her. 😢😭😟

Any thoughts or suggestions are very much appreciated. Ugh.