Your symptoms and HLA-B27 status strongly suggest an inflammatory condition like Ankylosing Spondylitis. The primary medications used to manage this are Nonsteroidal Anti-inflammatory Drugs (NSAIDs) like Naproxen or Celecoxib, which help reduce pain and morning stiffness. If NSAIDs do not provide enough relief, a rheumatologist may prescribe biologics (such as TNF inhibitors) or DMARDs to target the underlying inflammation and prevent joint damage. Please consult a rheumatologist for a formal diagnosis and a tailored prescription. Regular physical therapy is also highly recommended alongside medication to maintain hip and spine mobility.