Help! Rash at 14 weeks pregnant.

I've had this rash for a few weeks. It started as just one spot on my abdomen, but has spread to several spots on my abdomen, chest, neck, and shoulders. I don't know how worried I should be. I have a doctors appointment in a week, but I don't know if I should go sooner, or go to a emergency clinic. It's itches, and sometimes stings just a little bit. It feels like really dry skin. I've never had anything like this before. I'm currently 14 weeks 3 days pregnant. I haven't been too worried, but just saw someone say that rashes during pregnancy can be pretty serious. Any information or opinions are so appreciated. Thank you.