Sun-rash

I am a few days shy of 6 weeks and I have a bumpy, itchy rash on the tops of my feet and a little bit on my shins. I also have it on the tops of my hands and inside/side of my forearms. I am white but have pretty dark skin and I usually do not burn. I have been at the beach the last few days (I have been using sun screen bc I know skin is more sensitive during pregnancy). I am confused as to what this is. Has anyone else had anything similar?? Or any nurses/drs out there with any suggestions?? Thanks y’all!