According to your description of symptoms, you might have developed a lumbar radiculopathy... sometimes due to some pathology at vertebrae, we can have a compressed nerve and it gives symptoms at your legs, in most cases on the back side of the leg... don't worry, visit a nearby physiotherapist for further and clear assessment, as only after going through some physical tests that a physio performs we can conclude a diagnosis and provide you with a clear solution of the problem... meanwhile do some back extention exercises, you can google it for more details.... also you can apply hot packs at your lowerback that can help you with ypur pain.... feel free to contact for any doubt....

Hello neurological and vascular disorders should be ruled out consult surgeon and neurologist for further evaluation and treatment.