Cold sores and pregnancy

I'm 7 weeks pregnant and yesterday evening my lip started to tingle like it does when getting a cold sore. Over the span of 4 hours I had several on my upper lip, lower lip, chin, and nose. They hurt so bad and are so ugly. I've NEVER had an outbreak like this and I've had cold sores off and on since I was a child. Has anyone else gone through this or know if this could be pregnancy related?