How to heal a pulled hamstring?

I'm a cheerleader, and if anyone else is a cheerleader they understand that being flexible is very important. My coach said that I have to get my heel stretch in about a week. But I pulled my hamstring so I don't know what to do. Whenever I try to pull my leg up, it hurts really bad. I need the fastest way to heal my leg! I think I pulled it around two weeks ago if that helps.