H4 to F1 visa stamping in Canada without COS

Hi,

I am currently on H4 visa and doing Masters. I am planning to move to F1 visa from my Spring 2015 semester (starting Jan 2015).

Due to time constraint I can’t apply for change of status as normally it takes 2-3 months or more so only option left is to go for stamping. My current H4 is getting expire in Oct 2014 but I have received extension of it.

My question is

Can I go to Canada on my current H4 and do F1 stamping or not.

What if my F1 stamping is denied in Canada?

Can I reappear for H4 stamping in Canada?

Can I go back to India and reapear for F1 stamping ?

Please provide me your expert opinion on this.

Thanks,
HJ

HI Did you get your F1 visa?