I ate something I shouldn't have yesterday, cept I don't know what it was. At some point in the night last night I started to get hives and so it tells me that I had some or too much sulfur ... but I hardly ate anything yesterday because I was busy rushing around and then busy with the puppy and work. And I had a tuna sandwich for dinner. That should be fine. The only thing I can think of was I drank 3 maybe 4 of those Nescafe sachet coffee things - maybe they have a sulfur preservative in them?
ETA: And that was probably why I had trouble sleeping last night.
ETA2: When having a sulfur reaction, remember not to eat strawberries! ACK!