Time sensitive Job offer advice-- Am I crazy??...Psych vs tele..

So, I've been a psych nurse for 5 years, straight out of school with no m/s experience. I have been looking for a new job in psych or case management and on Fri. was offered a job that initially would have been my dream job-- inpatient psych case manager at a large teaching hospital.

However, over the past few weeks I have been considering venturing into medical nursing. I am feeling pretty burned out with psych and am itching to learn more medical stuff. I loved my ED rotation in school and would love to eventually work there. However, I HATED m/s rotations in nursing school, felt like I was always running around, never time to breathe, just throwing meds at people without talking to pts or understanding the big picture of what was going on.

So last night I was at my PD job and talked to a much more experienced nurse who recommended I go in person to a local hospital where she used to work, saying she thinks they would hire me into a tele unit (where they have a posted opening), even w/no experience, with a thorough orientation.

However, I need to let the CM job know on Monday.. She recommended to go down to the hospital tomorrow (Monday)-- which I could do (I work outpatient community mental health), but it would require a lot of finageling with my schedule, changing clothes during the day -- I am feeling stressed out thinking about it. And I'm not 100% sure I would even want the job! And if I did get it, I would have to back out of the CM job after accepting...

Am I crazy for pursuing the tele job, when I have this other job offer and it is causing me so much stress?? I am worried about starting the CM job and wanting to leave before a year to transfer into a medical unit...And I don't want to be forever pigeonholed in psych!! But am I crazy going back to m/s after I hated it so much in school?? Would tele be much different?

I am really sick of my current job and have been looking since late Feb, and the inpt CM job is the first job (I was offered 6 other psych and/or CM positions) I really feel positive/excited about -- so I don't want to turn it down on the chance I *might* get the tele job.

Any advice would be much appreciated!!!