Welcome to the STD forum. I'll try to help.
To put your question into medical terminology, you are asking whether you might have postherpetic neuralgia, which I will abbreviate PHN. There are certainly theoretical reasons why it might be expected that HSV could cause nerve-related pain (neuralgia), even in the absence of an outbreak. However, there is no clear evidence that it actually does so; and if it does, it is rare. Since you have another apparent cause of the pains you describe -- your "compressed" lower back -- I believe that is a more likely explanation for the problem, and symptom relief is going to come from proper management of your spine.
My suggestion is that you first see a neurologist. An orthopedist or neurosurgeon also would be OK. Check first with your primary care provider and see who s/he recommends; the best person in your community might be in any of those specialties.
Here is another thread that goes into PHN in more detail. Please take a look and let me know if you still have questions about it:
http://www.medhelp.org/posts/STDs/HSV2--PHN/show/491205
Going back to your description of your recurrent herpes, although this wasn't your main question: I am skeptical you really are having herpes outbreaks as often as once a month. Outbreaks are not triggered by menstruation (even though you can find some affected people on websites who believe they are), and real outbreaks rarely occur once a month -- especially when taking acyclovir. But you might discuss this with your primary care provider.
I hope this helps. Best wishes-- HHH, MD