Hi Kayleigh. Have you been evaluated by a doctor for this anytime over the past few years?
Do you notice anything unusual when you look at your legs? Is there any asymmetry or atrophy (muscle shrinkage)?
Calf pain with walking may indicate that you have claudication. This can be neurogenic from crowding of your spinal cord in the back (spinal stenosis) or vascular from disease in the blood vessels supplying the legs. These conditions need to be ruled out. Your GP can do this. In addition, it would be a good idea to get an ultrasound study of your calves to rule out blood clots, which often cause pain and swelling. If these more serious conditions have been ruled out, then one can consider musculoskeletal causes such as tendonitis or myositis (inflammation in the muscles).
If you tolerate aspirin, this will help reduce any inflammation, mitigate pain and thin the blood in case there is a circulation problem. Pain creams can also be helpful. Try massaging one into the calves several times per day. Finally, be sure to gently stretch your calves 2 or 3 times daily. You can do this by leaning forward against a wall while keeping your feet flat on the ground.