Crazy and yucky and not worth considering!
Colicky babies often do better on breastmilk because, well, it’s designed to be easy for babies to digest. That does not translate to adults. Adults are not designed to be able to digest milk at all, except for that 15% that have a genetic mutation that allow them to digest lactose into adulthood.
It wouldn’t do anything for your immune system. The antibodies in breast milk are made by the mother to be specific to that particular baby, at that point in time, in that particular environment. It’s a very cool, constant feedback, system, she makes what baby needs for age and which bacteria and viruses are in their environment on that day. Useless for an adult somewhere else, even if the antibodies DID survive pasteurization and storage.
Plus, it’s someone else’s bodily fluid! Who knows what the woman has been eating and drinking and what viruses she is carrying.
Not a good idea.
What does your doc say about your crappy gut issues? Do you have any idea what is causing them? I have IBS myself and it is better if I exercise regularly, avoid any fresh dairy products (aged is OK) and take a wheat dextrin fiber supplement very day (other forms of fiber supplement make it worse or don’t help).