Back/leg pain at 11+3?

T • Mama to a miracle🌈 6/8/21

I’ve noticed this morning I have pain in my left leg as if I walked miles yesterday, but didn’t?? If this a normal pregnancy thing or am I maybe lacking vitamins etc? If feels like behind my knee/hamstring area and in my lower back on the left side. I know he’s laying on that side bc of where I found him on my Doppler so maybe he’s just on a nerve or something??