Lidocaine -- will it stop working?

I was talking to someone recently (another vulvodynia sufferer) who told me that lidocaine is pretty much garunteed to stop working after about a year, and can even make things worse. Is this true? Lidocaine has been a godsend for me, as when I use it it completely removes my pain and I can have totally pain free sex. NOTHING ELSE WORKS. I am still trying meds with no success. The amitriptyline has taken the edge off, but hardly at all and I'm still nowhere close to pain free sex with just these pills. Raising the dosage has done nothing and I'm pretty much as high as I can go.

Do you think that if the lidocaine works so well with someone in the beginning, that it can still fail later? Or that persistent use can cause damage? I am only using 2% it seems like such a small amount. And only every three days or so at the very most. And when I use it I don't feel any burning like some women do.

Do you think that maybe this failure/damage only happens with women who apply it twice every single day? Because that's how my gyn suggested I use it. She said it would sort of train the nerves or kill them or something, and eventually they would stop hurting so much. But I didn't like doing that so I stopped very quickly and now only use it for pentration.

Please, your thoughts? Does anyone know of women who have had success with lidocaine and for whom it didn't stop working? I am so afraid now, I can't stop worrying.

I've seen online conversations between women about this and some have long term results without it stopping working and others find it just stops helping out of the blue. Although it's easier said than done it really isn't something you can worry about because there's no way of knowing if it will stop working, it doesn't seem to be to do with frequency of use or strength of the ointment it's just down to whether your body gets used to it. It's the same with meds, some women find they can get full relief at a really low dose and others get relief for a while followed by their bodies geting used to that dose and having to increase and add other meds so it's one of those things you can't possibly guess about. My last WH Physio said it's a really outdated method and the best thing to do is try and figure out why you have the V in the first place or any factors that may be keeping the pain going such as PFD etc and working on those while it's helping if it does help. Sorry I can't be more help but there really is no way of knowing if it will continue to work or not.

Oh God that's so scary. I am having a tough time dealing with this disorder on an emotional level at the moment. I don't understand why this is happening to me. Why do we have to deal with this? Its so cruel. And why aren't my meds working? My gyn won't see me again until June! So I'll have to wait until then to try something else. I can't stand the thought of lidocaine failing me.

EDIT: God I just read this back. It sounds so whiny, I'm sorry.

It's ok to be a bit worried but don't let it take over your life. I personally found 300mg of Pregabalin a day helped quite a bit for a while then went to bed pleased about it and woke up the following day with it no longer working so I can understand exactly how anxious you might be. I upped the dose and again it's helping to a degree but I'm very aware of the fact I'm one dose away from the maximum so I'm putting alot of effort into physiotherapy in the hope I won't need to add more medication and perhaps could reduce the amount I'm on. I think if something works then great but don't forget to cover all angles and possible causes so hopefully we can dispense with whatever we're using.