allergy or intolerance

Recerntly I have been having problems with certain foods, I have narrowed them down to by elimination diet as wheat, dairy and sugar. After ingesting wheat or sugar still can't figure which is causing the problem, I bloat up like crazy after about 2 hours,  and then after about 6 or 7 hours I swell, I mean I have water retention all over my entire body and just feel like a tightness in legs and hands and my face feels puffy. After I don't consume these I usually start to feel beter after about a 24 hours. I am afraid that if I eliminate them completely from my diet I will never get them in again but if consuming will cause problems then I don't want to cause any more harm to my body. Any advice? Does this sound like a true allergy or an intolerance.

[lliill g]

I also get the tightness in my legs. I say they feel like stuffed sausages. If I try to squat, it almost hurts the legs and skin.

I'm also allergic to "everything" so, I don't even know what to do any more.