Welcome to NeuroTalk:

I'd have B12 levels run and Vit D.... B12 should be at 400pg/ml as "normal".... Some people get neuro problems below that but are still reported "normal" by the labs:

This is why 400 should be attended to:
http://www.aafp.org/afp/2003/0301/p979.html
This sneaks up on many people today, so should be ruled out.

Also...do you use a statin? New evidence shows statins prevent REPAIR of axons. They inhibit growth factors which use B12, folate, magnesium and Omega-3 fatty acids to remyelinate damage to axons.
If you do use a statin, I will give you links to photos of damage they cause to cells, and also some biochemical links to how they do this damage.
If you use a statin, you could have been coasting along until a damaging event(s) occurred and now you are not remyelinating properly.

Also viruses have been thought to create autoimmune situations and attack the patient's nervous system. There are not yet tests for all these antibodies, but only some of them.
This is Dr. Latov's Neuropathy panel from Quest...He is in NY and considered one of the top neurologists on this subject.
http://www.questdiagnostics.com/test...ripheralNeurop

Viruses can attack the dorsal roots and there is now an improved MRI out there to visualize this if suspected.

It can be a long frustrating time trying to get a diagnosis. Some posters here have been years at it.

Many here keep a log to chart symptoms with daily environmental situations, food eaten, sleep, drugs taken, stress and yes, even sudden weather changes (barometric LOWs).
Sometimes there is a hint in the journal of where to look more closely. It would be a good idea to limit sugar and starchy carbs for a while and alcohol and see if that helps. Many say it does.