Options for H1B transfer in 3 weeks

[NiranjanKC]

Hi I am in big trouble. I work for an indian company in US. I was posted in US for 3 years.
I have approved petition but dont have a valid visa.
Now i have my marriage in 3 weeks time. My employer is not agreeing to send me back and i cannot postpone my travel also.
What are my options now for a H1B transfer?
Can i travel if i get a receipt number or can i travel only after i get a transferred petition.
In any case stamping is my hurdle.

Thanks for any info.