After reading your post, would agree with the previous that it may be best to get an Wikipedia reference-linkMRI scan, especially if it is not something that can not be pinpointed suggesting it could be more than one structure affected (muscle/tendon etc). This may eventually aid your rehabilitiaton by prescribing specific exercises relevant to that area to ensure effective recovery. In the meantime, may be worthwhile undergoing a biomechanicial assessment especially if you have flat feet or overpronate, as that can affect the overall mechanics in your lowerlimbs as you could be displacing you body weight on structures in your lowerlimbs that are not used to sustaining such pressures resulting in pain. If this is the case, orthotics are usually provided. Other than that, a good warm up before any physical activity is essential as this warms and softens your muscles, ensuring good bloodflow and nourishes your joints. Good luck with it all, hope this helps.