Simple solution.
Either be a pretty blonde and dead or value your health.
Eating is essential to living, colouring your hair isn't.
If you've already suffered some swelling, don't take any more silly risks. It could be your airways swelling next and you might not get another chance! Every year, a few people die from have a severe allergic reaction to hair colour products.
Also, have you told your hairdresser that you're allergic to colour?
They should ALWAYS do a patch test first and not colour your hair if you have any sort of reaction to the patch test., inc. highlights, as their insurance won't cover them if you have a severe reaction.
You might be ok with certain brands or colours that aren't mixed with an oxidising developer, but always do a patch test, without taking any antihistamines.
If it was me, I'd stop colouring my hair. It's just not worth the risk!