I am on H1B which is in RFE state and replied recently. My consulting company asking me to leave US in 15days as my project got over. Now I want to move to H4 on my spouse's H1 Visa. How safe is it to move to H4 when my H1 is in RFE, how much time required to move to H4 from H1? should I be on running pay roll by that time? Also What is the process to come back to H1 again?