See if your medical insurance would cover a cabulance to take you to and from work. I don't know what it takes to be eligible for the disabled vans where they come and pick up and take you wherever you need to go, but that would be another option if there's time.
I don't know anything about Seroquil, but there are supplements that will help lessen the misery of withdrawals by giving the brain what it needs to function properly. I wish I would have known about these supplements when I went off Effexor as I'm sure it would have made my life less stressful.
Here's an article on the subject:
How To Get Off Your Antidepressant Without Going Insane