IMO the call center can be stressful. Stress can cause other problems besides the lack of sleep. I guess it depends on how good you are at handling stress. I think people with our MI usually have difficulty handling large amounts of stress.

It sounds like you accepted the job and have been trained. So I would give the job a chance. But this is my opinion on what I would do in your situation. I think adjusting to being back in the workforce is a huge undertaking and will initially be very difficult. Perhaps set a date. By then, if the job is not working out, then quit. At least you then would have given the job a chance. Please keep your mental well-being your top priority.

BTW I will be in a similar situation soon.