All of the herbs I have seen mentioned here have one contrain dication or another. If one is not going to see an herbalist I would go for a straight jing tonic (which would probably work better anyway)
Check out Shilajit. Which I have to say is the most powerful Jing (or ojas since it is Auyervedic) tonic on the planet. Also Royal Jelly. With Royal Jelly I have had clients who actually began regrowing nerve ending that had been dead for over ten years. In a few months they had regenerated. Royal Jelly also tonifies the blood.
Blessings