My dilemma now is, if I should file a resignation or not. Medical will expire on Sept 11, 2010 ( date is kinda scary i know )

and until now I haven't heard anything if they will require an interview. Correct me if I'm wrong, normally interview date is informed a month ahead. Med expiration is barely six weeks and if they need more information or anything else, should they consider my medical? I am lost, really. Been crying for almost a month, and starting to lose my sanity. This waiting game is heart pounding, and mysterious. Please if someone can give me advise, I don't want to jeopardize my work and burn bridges with my employer. I have seen other cases in the other forum that they got their visa a week before the expiration. I don't want to leave my employer with no options, as I can use it as a reference once i start my career in canada. They will not give me a clearance or certificate of employment if I don't render a 30 day period as part of our SOP. Is it safe to email them about my dilemma? I can't afford to lose my job , I am the breadwinner of my family. My partner support me though, I am just not used of relying or putting a toll on her. She might be earning well, however she also have her own obligations and expenses. I am really sorry for my story telling. I hope I am welcome here

thank you in advance for taking your time to read this.