Well, if it helps the medical community isn't too sure either:
http://www.nytimes.com/1990/11/22/news/the-maligned-flat-foot-some-see-an-advantage.html
However you might want to check if there's any soft tissue or bone injury before you proceed with other forms of therapy. Therapists who are experts in soft tissue manipulation may not be experts in rehab, and PTs who are experts in rehab may not be aware of the pathological problems in the first place. A functional movement screen serves a different purpose from a medical assessment, so get the medical assessment first then approach a PT for rehab would be my choice, albeit an expensive one.
And in the mean time, the doctor would probably tell you to avoid physical activity etc even though there might be nothing wrong with you. So what do you do? If you've been assessed that there's nothing wrong medically, you may want to look for a therapist who can do soft tissue manipulation or a PT who knows how to improve the function of your hips and lower limbs.
When doctors tell me not to do something and can't explain why, it's usually because of legal implications or they simply don't know what's wrong beyond their tools/knowledge. So, you'll have to look elsewhere.
This is how I approach injuries these days.