i guess you can hire a private coach that seems like a bit of overkill at the high school level but i guess whatever floats your boat and your parents wallets
you mention you're "behind" and you've avoided all questions on this thread about your times. in sprinting altough you can get much better with conditioning and working on form and start there is a certain amount of raw speed one needs. if scoring in your league meet (unless your school is in the same league as LBP & LBW in cali) is a big deal but there is no mention of making the state final, or even making it to the state meet you may not have the raw speed. you may want to think about moving up.
just for giggles what is your 100m PR your 200m PR??