Yeah, I've regretted it a time or ten.
I started out as a graphic designer, but the pay was poor, the job was isolating... there just isn't much demand for graphic artists in my area of the country, and I had no real desire to move.
I could have been an art teacher, but I found out that I simply cannot stand a whole room full of other people's kids.
Really, there hasn't been much else for me to do. I wanted something that would give me a steady paycheck and a steady, comfortable living.
I've had some horrific moments in my 16 years as a nurse, but I've somehow persevered... now I have a job that I've had for almost three years, and this job sucks SOMETIMES, it really does... but I'm trying to stay put and focus on what I love about this job... namely coworkers who feel like family. And the occasional nights of lower census, when I feel like I can breathe a bit and maybe spend a little more time with each patient.
My advice... like others have said, if you have an area of nursing that you think you would actually love, then go for it!!!!! There are some downright crappy nursing jobs out there, and then there are some great ones. Don't give up yet.