Canker sores, sleep, trigger finger and anastrozole

I have been on anastrozole (generic for Arimidex) for almost seven months.   Aside from being a warm body temperature as in menopausal symptoms, I didn't notice any side effects until recently.   Now I am not sleeping soundly, I sometimes get what I think is trigger finger in my middle finger during the night and most disturbing is a return of canker sores.  Years ago I had what was often a debilitating problem with these mouth sores.  However, after I started a twice a day regimen of Lysine, Vit. C and B6, the incidence and severity of the canker sores decreased dramatically.   Now, I am again experiencing the kind of frequency and severity of canker sores that I had years ago, despite taking extra Lysine, which usually helps.   I am perplexed that these symptoms started after six months.  When I had cankers before, I tried every treatment known to humankind.  Nothing was as effective as the lysine, Vit. C and B-6 and, though I can suffer any other side effects of the Anastrozole, I cannot bear a return to the canker sores.   Anyone else experience increased symptoms such as these months after going on the drug?