My 10 year old son is experiencing your begining symptoms. He has always had issues with constipation even as a baby, so we knew there was something going on in his tummy but never figured it out. Then suddenly one day he could not eat ice cream without experiencing extreme pain/discomfort and diarrhea. We didnt know what to make of that because drinking milk created no problem. In the last 5 months his body gradually told us that he is lactose intolerant and we have cut out all milk and cream products. He can still eat cheese in limited quantities. We found lactose free milk the other day and he begged me to get it - two helpings of this and he was covered in hives.
Now, this may sound off topic but bear with me. Years ago I suddenly developed a sensitivity to MSG. I was covered in hives. First I couldnt have anything that had a large quantity of MSG - first 5 ingredients, within 2 months I couldnt have one tiny itsy bitsy grain of anything with MSG in it. within 2 years the sensitivity had passed. Over the years I have developed sudden reactions to foods I have consumed my entire life, for a year it was coffee, lately it was beer and now bread. These senitivities come and go, the identification is the bother. My MD told me that I have a hyperactive immune system and to stay away from anything that will bolster it - no echinacea etc...
SO,,,, perhaps your sensitivity to lactose is ramping up and the lactose in cheese set you off - or you are switching sensitivities like I did. Your previous answer has a point too, mixing substances may be the trigger. I am sorry I could not really help, but know you are not alone. ONe thing I have found that helps is drinking huge amounts of water since it seems to help flush the crap outta my system.
With these allergy issues, often thinking out of the box and seeing practitioners of alternative medicine seems to be beneficial. We have a homeopathic Dr in Seattle who has helped several of my friends identify their food triggers. THe kids and I will be seeing her shortly. Ask around your town.
BTW - ZippFizz energy drink has 40,000% of the usrda for B12. It rocks.
this may sound off the subject at first, but hear me out, my daughter, now 10, suffers from hives on and off. i had taken her to her doctor several times when she was a baby and told they could preform the allergy tests, but they are long and painful, and may be fruitless and i was advised to change everything, one thing at a time, until they stopped. in my ten year battle, i have learned this she is definitely allergic to at least one of the chemicals in mr bubble bubble bath, heat makes it worse, and so does anxiety. she still has breakouts, sometimes going many months between, then all of a sudden she's covered head to toe for days on end with no change to anything we normally perchase in the entire house.
so here is my point, perhaps you are allergic to two or more food products, but the reaction is only present when you eat a combination, and perhaps temperature and your anxiety over all this mess increases your reaction.
have you tried speaking with a nutritionist that will not profit from putting you on meds? and take it easy on the b12, you could end up with more side effects from that. you sound just like my husband, german chocolate cake and all! good luck to you sir!
ps, your writing was fine, the length is what drew me in