Sea Lice are the embryos of those jellyfish, microscopic. At least that was what I’ve been told. Perhaps worth googling it. You are in for a ride for about 7-10 days and I feel for you. Been there, done that. The only thing I found that helped some, and I only mean some, was to take antihistamines. People have all sorts of remedies but nothing worked for me, except antihistamines. Try really hard to not scratch those blisters, will only spread the toxin and make it worse.. good luck!