J1 to H4 EAD

[holyriver6@gmail.com]

Hello!

I am still on J1 visa and working for a university. My visa will expire on August 2018. My J1 cannot be extended as I have the waiver approved. My husband has an I-140 EB1A category approved but we could not file for I-485 as it is stopped from April 2018 and the status is no longer current for Indians. My question is can I switch to H4 and H4 EAD while in the USA? If I do not get the H4 papers on time after the expiration of j1 visa am I still allowed to stay in the USA? The processing time for H4 documents in Vermont service center is 9 months now. It is very very long. 

Any suggestions?