Any chance you may be allergic to the chemical in the sunscreen? I can't have any that's over SPF 15, and even that is pushing it for me. Otherwise I get rashes and hives.
Which isn't cool since I have fair skin and family history of skin cancer, but I wear as high as I can go and limit time in the sun.
But that's just my experience, maybe someone else has another idea.
Hope you feel better soon.