Sorry this is all rubbish I got diagnosed with IBS 5 years ago when I was basically a prisoner in my own home cos I was too scared to leave even for a 20 minute stroll around the block in case I had an attack.
I wouldn't have been able to do hour long drives to and from my boyfriends, go for long walks round the peak district and be trekking round shops.
The first thing upon diagnosis doctors would try and get you to do is eat a FODMAP diet. This isn't high protein or gluten free so don't know where she's got that from. My doctors also never mentioned to me probiotics or actimel as the problem isn't bacteria in your stomach it's your intestines unnaturally contracting so fail to see how probiotics or actimel would help.
If your doctor believed it to be really bad they'd also give you some mild anti depressants like the amitriptalyne they gave me to try and calm the stomach down
If her doctors told her to take actimel sounds like they're sick of hearing her and just wanted rid of her so pied her off with some actimel
I seriously think she has munchausens the way she's going on lately