You don't need insurance to see a physician/therapist. The only difference is that you'd have to pay out of pocket, which can be expensive.
Have you looked into individual insurance? The younger you are, the cheaper it typically is, but it can get pricey. I don't know if you are in college or not, but universities usually offer a group policy for students that don't have coverage. I know my school charges $1500 per year for HMO healthcare through Aetna (it's required if you don't have insurance). Fortunately, I'm covered on my parents' policy.