Oh eastcoastmum2014, bless you!
. Mine is 14wks now, when she was a week old she did exactly the same as yours, the nights seemed endless and you are exhausted! I agree with others her that it isn't really colic, it is just a cruel fact that babies are born before they are really ready to cope with life. At first DD wasn't able to be sick, burp, fart! Gradually over the first few days and weeks she developed these 'skills' and the trapped wind improved, but I too felt so awful and helpless seeing her in pain. It does pass quickly, and it doesn't do your baby any harm, and she will have forgotten all about it long before you have so try not to worry.
My tips such as they are: this will probably be what happens every night for a little while and you need to ride it out. We took shifts so we could get a little rest, so DH looked after DD from 9-11pm while I got a bit of sleep, then I took over for an hour or so and so on until we got her settled. Also remember that you are not doing anything wrong, and there is likely nothing wrong with your baby either (although by all means see the GP to make sure), this is just how it is with a newborn and you are doing a great job!
Lastly, it says on the gripe water bottle that it is for one month up, we used it in desperation from 2wks and DD was fine.. It was the only thing that actually seemed to help her, although if you are having results with dentinox then that's great
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Sorry for the long post! Get some rest when you can.