Hi to all mommies here, Im 14weeks pregnant now... Im experiencing a back pain and the pain go to my legs... Anyone experienced it before?

Hi to all mommies here, Im 14weeks pregnant now... Im experiencing a back pain and the pain go to my legs... feels like my body hot even no fever like all my muscle like going to be chill..Anyone experienced it before?im so worried, for my past three days i walked to much.. and i cant even fall asleep at night... ? I need a advise, I cant go to see my Ob now due, im out of the country...