Yes this is a very common outcome after travellers tummy. all the good bacteria in your intestine have been put out of action, which causes irritable bowel symptoms of bloating and wind, which is awful. plain bio yoghurt can be helpful to help repopulate your gut with good bacteria, but the biotics from a herbal shop will probably be more effective. as far as wind is concerned, charcoal tablets can help to absorb some of it and its noxious side effects! try to avoid dairy products, other than the yoghurt as they tend to make it worse. milk is especially problematic after this kind of thing. i have irritable bowel anyway, and try to use these measures when i have an attack, wheat also affects me quite badly, so avoiding this for a while might help. it will settle down eventually. incidentally did you take any antibiotics during the attack?