Is a year too late for physical Therapy?

Okay, I am a 20 years old female, and last May I was run over by an old lady in her Taurus. My doctors prescribed physical therapy, but I had two jobs and an internship to worry about, so I put it off. It's slowly healed (or so I thought) and I was back on my feet within two weeks, and eventually runnin around again by a month and a half. Well, yesterday and on Monday, I was sprinting up and down some hilly trails near my house. the first round was great, but the second one felt weird. Like my left leg felt almost not as responsive as my right leg. I ignored it, and after a half hour went home and went to bed. Today, I woke up to an incredibly sore left leg. The area it hurts now, was precisely the area my phone was in when it got crushed into my hip. It's been making me limp all day, and now I'm wondering if I should try physical therapy, but worried it might be too late.