Chances to retain H1-B status .... Conversion from H4 to H1-B

Hi…

My H1-B is currently approved (Oct 2013-2016) and started a week ago with Employer XX.  My current project will end in two weeks.

I would like to go to India right after the completion of my project by the end of this month and plan to stay in India for three-four months due to personal reasons. It is obvious that my H1-B will be cancelled with Employer XX .



--- What are my chances of returning to the USA with H1-B status after 3 months?



Else....



--- If I get back to the US on visitor visa or H4 (dependent) after few months (3-4 months) and have an employer BB who can transfer H1,
Is there a chance to convert from H4 to H1-B (Since I already got H1-B approved this year {but it will not be stamped))?

2. - Do I have to wait until April to file a new H1 or It can be done anytime after I come back to the US as its going to be transfer of H1-B?

3. - From when can I start working if I find a job in few months right after coming back to the US?

Thanks in advance for ur advice,

Keerthi