H1 got approved when in India & came back on H4.Am I eligible to work?


I am on H4 and filed for a H1b this year.I travelled to India on a personal emergency in October.My H1 was approved on Oct 5th while I was in India.I skiped the stamping and entered US on my H4.I had already applied for a SSN,but not yet received.

1)In case if I get an SSN will I be able to start working?

2)My employer is ready to put me into work.If I go ahead and start working,will there be any risk in future,like when I go for next stamping or so?

3)Is there any other option for me to make my H1B active and start working without going back to India.

Please help me.