@youngdogmum My (highly respected) oncologist tells me that a three month break from Letrozole has been proved to be safe. I saw her yesterday and she again alluded to that fact.
I think you need to speak to your own oncologist about how to proceed. I know my oncologist didn't want me starting on Letrozole before my DIEP. I waited a month after the operation.
Get the facts, and then if you're still anxious, perhaps work with a counsellor to manage your fears? Try not to anticipate trouble where there may be none. Easier said than done I know! Hang in there, K xox