I've just been to doctor who said my blood pressure is fine. i still have calf pain, shin pain and thigh pain. could this be a blood clot?

Probably not : With your age -- i would consider rhabdomyolysis or muscle trauma, and neuropathy.

See below: Dvt is the term i believe you're referring to as a blood clot. Usual presentation will involve calf pain and swelling that is progressively unbearable. A screening test for this is called a venous doppler. This can be ordered by your medical physician .Usually a good thorough history and physical is able to rule out this condition. Go back to your medical doctor or seek out an orthopedic surgeon for evaluation. I would do this as soon as possible like tomorrow good luck thank you.