Hi Aurelia - Hopefully now you have discovered what you are allergic to you should start to feel better. I have been a vegan for a while now and don't eat any dairy products or wheat. I use soya milk which is great, but unfortunately in Spain we can't get the soya marg or anything so I just manage without, as it is easier to just have a different diet rather than substitute. In UK you can get a lot of alternative stuff in Holland and Barrett and even in the larger supermarkets too. They do soya cheese and custard and spread too. If you look for vegan recipes on the web you should find quite a lot of good ones.