Can be a symptom. I'd speak to a doctor i've never experienced it until my last few weeks. It may be perfectly normal. Just get it confirmed call your midwife.
Omg I have had this same thing since I found out I was pregnant!!! I thought I was alone and was kind of worried! Lol it was actually one of my first symptoms along with my boobs being sore. I'm 16 weeks and my legs still burn like they would when you get sick. My bp has also been fine.