H1B Approved oct 2011-OPT Still valid ????

[SUBMIT999]

I am on my OPT now and currently working (Less Pay) , has opt until Dec 4th. I applied for my H1B through a consulting company and H1B got approved.

Should I stop the current job from Oct 1st , even if I have my OPT until Dec 4th?

If I don’t get the project in OCT, I will be out of status; Can I apply for H4 visa also and make use of H1B when I get the project?

Please help I am so confused.