Yes, lower lumbar spinal issues should be ruled out.
Go for a lower lumbar spinal X-ray and follow up with an orthopedician to correlate all your symptoms. A neurologist can also help.
There can also be a atypical presentation of the sciatica pain which may not start from medial side of the thigh.
You should probably ask your doctor for Xrays or an MRI or CT scan just to make sure nothing is going on. If they come back clean, you might speak to him about seeing a neurologist. This could be neuropathy. Hope you get better soon. See a different doctor if you have to, to get a second opinion.