hamstrings another on my big injury list.,... tore mine deadlifting a year or more ago....
did your hear an audable pop when u hurt it or did it just become sore?
best to get it treated, ultra sound and hard sports massage work wonders on healing... even a good hard massage off your gf a few times a week when your resting would help, when the pain goes down, gently stretch each day until you can stretch to the same degree or more pre injury..