Sudden reflux 12 weeks old?

[Lockdownbaby2021]

My baby for the last week has been awful after feeding. He is bottle fed and has started arching his back and kicking legs/ screaming after every feed and been vomiting bits up for the next few hours. We have changed nothing, he’s still on the same formula (kendamil) and same bottles etc and was overall very content after feeds!!
The only things I can pinpoint is that he’s started drooling loads? Could this cause the relflux?
He also had his 8 week vaccinations last Friday (had them late due to being poorly a few weeks back).
has anyone else had the same? I just don’t understand why it’s started now. It’s making feeding him an unpleasant experience.

How is he tonight @Lockdownbaby2021?

@CadyEastman He’s screamed after every bottle today! I just don’t understand, he was okay up until his jabs 😭 it’s been 9 days since he’s had them! He’s still drinking but screaming after and arching back and then being sick up until the next bottle.
it’s strange because other than the time he’s crying after bottles and calmed down he’s smiling. Then it all starts again for his next bottle.

If it's been 9 days I tiki I'd try a different brand if it was my baby

@CadyEastman even though he’s been on the same one since birth and been okay?xx

If he was mine I would yes, he seems unhappy on now and it's the first thing I'd try and rule out

how’s he doing now?

@Smiles32 he’s now 6 months. Still sick but we changed to Hipp Organic and he’s a lot happier after feeds! I think it was the kendamil and also jabs which threw him off. X