PATH trains do run all night but after midnight they are often more than a half hour apart. Stations can be pretty deserted that late. I ride PATH trains and New York subways but I would not ride alone at 4 am.

Do your ankle injury and back problems predate your hiring on the railroad? If so, why did you hire out on the railroad, knowing that the working conditions were described to you at some kind of hiring session?

Pain issues aside, WHY are you unhappy? Is it because of the hours, or the people you work with? Keep in mind that, should you decide to stay, you'll gain in seniority, which will let you hold other desirable assignments that you, as a "young" trainman, can only dream of holding.

When I first hired out in 2000 on a Class I freight carrier, the ONLY assignments I could hold were on the road: first freight pools, then the extraboard (we called it "working the list"). In time, as others older than me left due to resignation, retirement or termination, I moved up, and was eventually able to hold certain yard jobs regular, which did wonders for my home life. At the time I resigned in 2008, I held a regular relief yard job.

As for the "physically demanding" part, wasn't that also mentioned to you? When I hired out, I was hardly physically fit by any measure, but I stuck it out, and the activity worked in my favor, as I got to exercise simply by the work I did as a conductor.

"Light duty" does NOT exist on the railroad; everything is heavy, hard work. Regarding your ankle injury, was it sustained BEFORE you hired out, or on the railroad? Did you go to physical therapy? What about your back? Have you seen a doctor? As for the "physically demanding" part, have you considered exercising in your spare time to build up your strength and stamina?

Don't worry, your waiting list is not much high, it's definitely going to confirm. Just check the pnr status of your ticket before few days of the journey, in case it doesn't get confirm, you can go for tatkal ticket.

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Pets do travel well on trains.
In my country all pets that are legal and travel in a pet carrier no bigger than a small suitcase travel for free.
Dogs small enough to travel in a bag also travel for free as long as they do sit on the lap or in the bag while in the train.
Bigger dogs do need a 'dog' train ticket which is not expensive.
I have even seen pet parrots being carried on a shoulder, sitting free.
That is the Netherlands.

But I have to admit that we have a very generous rules, most countries have more restricting rules.

I never have seen of a pet being travel sick on a train, so I say in that way pets can travel as well. (But do test on a short travel before you do a long travel, in case your pet is not as sturdy.)