I think the same thing happened to me. fishing here in eastern oregon I was wet wadding the last few days and my legs started to really itch but know matter how much I itched it never turned red well only on my arms. but I know it ws the river because I was fine until I started wadding. I now have it in my eyes and it sucks but it is getting better so I think I will wait it out. When the water warms up it is more hospitable to diseases and bacterias.

I hate hospitals