I've been having the same problem now for 5 weeks.
My physio says I have either torn it or have a hernia.
If pain still persisting in a fortnights time my physio will write a letter to my Drs
The sharp pains are very painful causing leg to feel that it's giving way and the need to grab the area.
I have piriformis syndrome going aswell at the moment so pain has become part of my life lately