Welcome Marina, your English is very good so don't worry. Congratulations on all the weightloss, that's a lot of weight to lose on IE, I've only managed 10lbs since February.
I know a couple of people who have a sensitive GI tract, a friend who seems to suffer in the same way you do and my husband who doesn't suffer often and when he does it's due to eating too much of one thing and not enough fresh veggies. Most of the time his troubles stem from not drinking enough water so I have to chase him around with glasses full of water for a few days until he gets better.
"Binging is a descent into a world where every restriction... is cut loose. At its core is a feeling of deprivation.. a feeling you can never get enough. Binges do not signify a lack of willpower or inability to care for yourself. On the contrary, binges are a urgent attempt to care for yourself when you feel uncared for. They are the voice of survival. Binges are the mark of the self that says, 'I am tired of feeling deprived, of being told I am wrong, that I am bad." - Geneen Roth