Baby crying for hours help !

[Snowdrops17]

So all of a sudden today my 12 week old is crying and crying for an hour + and then will pass wind and eventually have a poo this is all new behaviour can a baby suddenly develop CMA ? Or if she were beginning to teeth could it do this ? She is also very hungry which isn't like her I could give her a 4oz bottle she will only drink 3oz but an hour later crying for more she has never done this either . My other thought is would silent reflux do this ? I just don't know what to do for her.l and she won't sleep as she is in pain also has had the hiccups multiple times today usually she might get them once a day

Sounds like she's is gulping air whilst being so hungry guzzling the bottle. Trapped wind is excruciating.
I think infacol is for burping and wind.
Brup her for longer than you think you should. Tilt her at a slightly right angle to get the pocket of air out of her tummy.
Bicycle legs and cosy baths are good too.
Doesn't sound like cmpa at all to me

Also, babies do go through phases of just crying for no real reason (though usually they’re finishing that stage by 12 weeks I think). Not to say there definitely isn’t anything wrong, but it could just be normal baby behaviour. Both mine did it for a few weeks. It was not fun.