You're picking up quite a list, Sam. You may want to start a diary - what you had/used and when. Like chasing down what causes migraine - it can be a pain finding out what causes these things.
They do come and go. For years I couldn't eat bananas without turning into Itchy McItch. Now I have no problem with them, as long as they're not overripe. My hay fever has subdued over the years too, but I think that's quite common - Spring and early Summer used to be hell. I still use only a very limited range of cosmetic products, and never wear makeup at all, simply because they've caused problems in the past.
If you start keeping a note, you can correlate common factors. Then you can start checking the contents of stuff you're planning to use.