My husband is on H1B but his contract will end in Nov. I"m on the process of US citizen which I should get it in Jan next year. What should I do while we are waiting to process his green card? Can we switch his H1B to J1?At the end of his job contract, he needs to leave within 10 days. Can he leave and come back as a visitor without a visiting visa since he is from Germany and then I file for his green card?