General Nonimmigrant Visa

I have an approved H-1B petition. Right now, I am in India. However, my spouse also holds an H-1B. Can I apply for an H-4 visa and travel to the USA with my spouse and apply for a change of status in the USA from consular processing and use my H-1B there. Will it affect my H-1B in any way?

I am on an L-1 visa, and I am working in the U.S.. My wife is outside the U.S. Her L-2 visa has expired. We want to get an appointment somewhere to get visa stamping together. I cannot travel without an appointment, or else I will be stuck and will not return to the U.S. without visa stamping. The embassy has not opened for more than a year now, and she is stuck, so how can we get appointments? Can this be an emergency appointment case?