does anyone have cramps and pain in legs?

I am 5-6wks along according to my first appointment with my GP. I haven't had an ultrasound yet. I have had this constant pain around left tigh. I am cramping here and there but mostly on the left side. I used to have this pain before I was married and trying for kids about 2-3 yrs ago. I am afraid however because I don't know if this is pregnancy related or not. Just wondering if anyone else feels it.