Try prune juice with water. Nothing banana.
theres a link with a lil info about tummy aches in babies.
and also try reading up a lil on colic
As far as the IBM, it is common for babies; my son was that way at about that age. As weird as it sounds, I was told to use a glove and vaseline and apply slight pressure to help get the movement started, BUT to not do it often because then the babies start relying on that. Also when the baby does start pooping, if it comes out like pebbles, thats when you need to take him in. I can't remember what it meant, but I remember that's what you wanna make sure to get checked out.
breastfeeding takes care of all these problems
Actually, I breastfed all my babies (four!) and the youngest (13 mos & still nursing pt) had these very same problems from 2 mos. - even the early teething! The doctor said the same thing - some babies go up to a week - which doesn't make any sense. Besides, I couldn't watch him hurt like that for a week w/o doing everything under the sun to try to help him! We even tried warm water enema, which didn't help, either.
No luck with prune juice - HOWEVER, giving him baby food prunes daily (we used the Gerber organic ones) did the trick, although he'll still go for more than a day, sometimes, with no BM. Because your baby is so little, you might thin the prunes by putting it into his formula, rather than trying to spoon feed a 2 m.o.
My baby stopped needing daily prunes @ about 9 mos.
We also used a lot of massage, counter-clockwise slowly over the entire belly/gut section and over his buttocks and down his thighs.
He used to throw up baby cereal, too, which we tried at 4 mos. (rice, single grain, then tried oatmeal, single grain, but he threw them both up, w/in an hour of feeding).
He has always had a good appetite and likes to try new foods, but I think his guts will always be an issue. I'm going to try the probiotic idea - that seems very sensible.
And, lol - we have the craziest conversations here, too - even took a picture of one, once b/c we wanted to ask the doc was it normal. (We chickened out of asking, and had found the prunes by then.)
Ditto on the stay away from bananas, even mixed with things (whenever you feed him solids) - they are the kiss-of-misery for babies w/ constipation. Stay away from green beans and especially peas, too, if my baby's reaction was typical. The legumes gave him terrible gas, and he'd wake up, with that shrill cry of pain, and be writhing and kicking his tiny legs. So upsetting, poor baby.
Incidentally, at two months old, babies guts start getting more efficient at absorbing more nutrients & liquid out of their diet (breastmilk, formula), which is why, I think, that some babies have a problem at this age.