Yes had something similar was called Urticaria and was from a change in just one product needless to say have not used it since. Hope your ok and suggest you think about new different batch of chemical you may have used, I had to go over several and realised it was a free sample that must have done it.
Scary stuff none the less. Felt much better having a DR for wife, piraton cleared it up no bother if it ever happen again.