Hi Susan!!!
Gosh, I'm sorry you're hurting! Sue, it sounds like masto to me and it sounds like several things. I know that on good days I could probably eat everything you've had there, but if it's a "full bucket" day then I'd be reacting to the cheese, the tomatoes, the tuna... Especially the three together. Cottage cheese and farm cheeses are the best because the aging process is what raises the histamines, but when I've been on bad days, then even that will trigger me.
Have you been overly stressed at work or home? Getting enough sleep? What about meds, you're not running low are you - you know what I mean - over time it seems that our levels seem to rise and so the need for more meds goes with it. Perhaps this is what's happening. Yet, here's another thought - it is flu season for your guys up there and none of us are immune to it. I got a stomach bug 2 years ago that just turned my insides to pure liquid and I lost about 10-12 pounds in a week! It was awful! The two, masto and the bug, kicked in and had a royal party together!!! This could also be a possibility and you had the bad timing of eating fish to coincide. I didn't have any vomiting, but just horrendous diarrhea.
So, perhaps this is the situation that has you doubled over.
So, what to do - Increase your H2 blocker!!! Take an extra right now and see if this helps. It certainly won't hurt and if it doesn't resolve the situation, then you'll know, it's not the masto and you need to consider what the next step is from there.
I hope this helps and I hope you feel better quickly!!!
Hugs!!
Lisa