I Am 51 Years Old, Not Exercising A Lot Now,

I am 51 years old, not exercising a lot now, about 15lbs over weight. In the last month or so I've been experiencing hip pain, particularly on my right side. It is kind of a constant during the day, a 2-3 on a 10 scale, but when I wake up it is worse. What kind of a doctor would I seek help from? Is this something I should worry about?

Thank you,
Kathy