Charliebubs,

Your doc is correct. You need to at least give it two maybe even three weeks. I would get immediate relief from the numbing medication and THEN had to wait to see if they worked. At times I even called saying they didn't work only to have it finally kick in. So, just give it some more time. And again, the doc is right...sometimes they don't work and a person does need another set. So, just hang in there. And just speaking of myself, when they didn't work, it was because they just didn't find the right pain generator. I know it is frustrating but with ON it can take awhile just through trial error.