It's hard to say what it is until you get it checked out. It could be gastritis.
I advise calling or seeing your doctor ASAP, or a trip to the ER. The symptoms could be caused by a number of conditions, including adhesions (scar tissue) that can strangle intestines. It could be something less threatening, but don't delay help.
There's a few different reasons this could be happening, like Patty Inglish, MS, I advise that you see your doctor right away. I would need to know how long it has been since you've had your baby, (it could be uterine contractions, your uterus is returning to normal size, this can hurt a lot, especially during or after breastfeeding your baby. ) It also could be something as simple as really bad gas, if you just had your baby not too long ago your body is going through a lot of changes and intestinal discomfort is part of the parcel.
Like Patty said, it could be something less threatening, but it's best to be checked out by a doctor!
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