Really worried about pains in legs

David, 2 weeks ago

I'm in my mid-40s, always been healthy, very slim and in reasonably good shape. However, I have recently, in the last two months or so, noticed that I occasionally get sudden sharp pains in my legs - calf/thigh area - not terribly painful but noticeable. I've also had cramps in my legs a few times.

Have been searching the internet and have convinced myself that it's Multiple Sclerosis (MS) or something similar.

Advice please, I need it.