If you were working 16 hours per week, that is one thing... but if you were working 16 hours per day for most days, and going to school, that can really mess things up. The workload for most nursing students isn't horrible, but it is a lot more than they usually thought at first. Get through the semester, get your time management on track, make sure you build in some quality sleep time, and give it a go again, without having to work so much. Over the summer break, if you don't have school then, consider increasing your work hours, but still use good time/sleep management so that you can make some money to bank before going back to school in the fall.
Also, make sure you really want to do nursing. It's not easy to get through school even if you don't have to work... I have to work, but I count myself very lucky in that I can study while I'm at work, otherwise it wouldn't be possible.
The "tone" that I got from your first post in this thread indicated to me that you were clearly headed for burnout. I suspect that you made the right decision for you, based on your circumstances at the time. You now have a chance to re-evaluate your situation and make some adjustments. You already know how much is too much because you've found that point for you!
A couple years ago, I found my own limits. Fortunately for me, I was able to make some adjustments and keep on going. I was lucky in that I had a couple instructors that were willing to be a sounding board for those changes and, well, here I am today, just a semester away from graduation. It is possible to do this, but you have to be willing to examine your own situation and willing to be flexible enough to make some necessary changes.
Like others have already said, you now know what you don't want to do... so figure out what you really do want to do and go for it, even if it's not nursing! In my case, nursing is an expression of the kind of person I am. At my current job, I don't wake up wanting to go to work, though it fills a necessary need. When I was working as a Paramedic, and on clinical days now, I wake up in the morning, excited and happy to bounce out of bed to go to do that stuff. Yes, it's not easy doing those things, but it's not work. Work is something you dread. There's a reason why "work" is a 4-letter word. This is fun. This is challenging. This is physically demanding and tiring. I've yet to work a day in my life while doing patient care.
Do you feel that way about something? If so, do it!