Hip flexor pain? help please!?

okay so my hip flexor has been hurting for awhile. I do gymnastics and it hurts on vault. It doesn't hurt to run i've noticed, but to hurdle and slam the board and then to land really aggregates it. It only hurts on vault and sometimes do balk walkovers. Tumbling doesn't aggravate it at all. But anyway could it be possible that because it was strained it tighten up alot and since i didn't stretch it it just idk .. hurts? My mom lost our health insurance and i can't go to the doctor. I really don't know what to do. I started icing..but i think its a little late since it happened weeks ago. I can't afford a week off..unless i have my mom talk to the coach about taking a week off from vaulting for a bit. maybe that will work. What do you think i should do? What do you think might be wrong? Please help..