H1B RFE and Passport Expiring Soon

Visa Expired - 10th July 2018I94 Expired - 20th July 2018Extension Filed - 22nd June 2018Converted to Premium - 13th Nov 2018RFE Mailed - 23rd Nov 2018Indian Passport Expires - 2nd Feb 2019How many days does it takes to receive RFE in mail?What are the options I have now?Can I renew passport now?Can I renew passport after getting decision on visa?Can I stay in US with expired passport or passport extension in pending status?Any suggestions really helps.