I am laid off today---PJ teacher--Pls help!!!

Teachers:

I was laid off today. My status is: I140 was approved last July, i-485 notice date was 7/2 and FP was done on Sept last year. Did not apply EAD last year. Just filed EAD today.

My question:
1. if I am still legally stay in here? any law can share?
2. if I find a new same or smilar job next month, how USCIS will look at this gap period, which is from today to the new employment date.

Very upet. Please help.

Thanks very much,