H1B extension got rejected, i94 expired

Hi,

My H1B extension got denied. My i94 also expired. I have converted from h4 to h1 on sep 1st 2015. I don’t have valid H1B stamping in my passport.

My question is,

  1. How long I can stay in USA?

  2. Can I convert from h1 to h4 as soon as possible? Is it required travel to home country?

  3. What are the options I have?

  4. Currently I am working for a abc client. Can I work for them until my 240 days rule expire.? Or else can I stay in USA until get my h4 receipt number?