Help with a Hip Flexor Problem?

Ive never had a hip flexor problem in my life, but this year Ive been playing football on a turf field everyday (not sure if the turf has anything to do with my problem) and in 3 months i've pulled/strained my right hip flexor atleast 2 times sprinting. Its a really annoying injury because it flares up everytime I sprint at football practice, and then doesnt hurt again until my next practice. The one I currently have has been with me for almost 2 weeks. Im just wondering what are some things i can do to get rid of these hip flexor problems. Im just about to start track and field at school and its a real struggle to sprint with a strained hip flexor. Thanks