F1 visa stamping for current masters student on H4 visa

[sharanyajuly]

Hi,

I have started my masters in Fall 2013 on H4 visa. and in December i am visiting India and i am planning to get F-1 visa stamping.
Please advice is i fall into change of visa status category or new F1 visa status category.

Also if F1 stamping is rejected, can i re-enter US on H4 visa and continue my master's and apply for COS in US.

My collage has recommended to get F1 stamping in India while i visit, as COS from H4 to F1 may take 3-4 months.

Thanks for your time in advance