What Causes Red Blotches On Face?

I have been having random fevers with hives on my face for the last couple weeks. I'll feel fine, and all the sudden my face starts itching and feels very warm. I'll look in the mirror and I'll have huge red blotches on my face. To add to that, about a week ago I started getting this "fluttering" feeling, especially in my forhead and I also was very sick to my stomach (vomiting) this past weekend. I haven't been sick to my stomach since Saturday, but the fever, red blotches and fluttering feeling won't go away. I keep telling myself it's due to all the stress I've been going through, but should I see a doctor?