Can a chiropractor help with numbness in feet and legs? I'll try it if you think it helps.

Yes. If the numbness is due to a structural problem where your spin or hips are out of alignment, chiropractic treatment should help.
Possibly. If you have back problems( pinched nerve, disc issues) then a chiropractor may be helpful. If the numbness started in your feet without any type of back problems then you likely will not get any relief from a chiropractor.