Hang in there! It will be alot better after orientation is complete!! You're almost done- treat yourself to maid service for the next couple of weeks and buy some great coffee
I did this when I transistioned from my first to second job. I was working Baylor on third shift for job1 when we moved for hubby to complete college, to a new town about 30miles away. NewTown had a local hospital not associated/in competition w/ job 1. Job1 was where I started nursing- CNA, most of my clinicals, and then as an RN. My Mom worked there, I had my babies there, so it was 'home'. It was also the place that went from a local stand alone entity to being bought out by a large 'drain 'em and flip 'em' conglomerate. After each flip- it just got worse. So, I put in for PRN at job2. Similiar to your situation in that we were all called off alot in the summer (but had mandatory OT in the winter.) I had 6-8wks orientation at job2, FT hours and the first part of it was on days- ugh. Hubby was just in school part-time for the summer, so that helped but I had no life except job1, job2, and sleep. The last two weeks, (though I was at least on the same shift at both jobs), my hubby had a family member who was diagnosed w/ a terminal illness and sent home w/ hospice. That's when I almost didn't make it. I didn't sleep in my own bed for those last two weeks as every day off was spent helping out. In the long run though- it was worth it because I had the flexibility of PRN and could help out a lot more when it really mattered.
Eventually, I quit job1 entirely. After flip #I can't remember, it was just too risky. I learned from job2 that MS nursing may be hard, but it didn't have to be hopeless as implied by mgmt at job1. I stayed PRN yet working FT hrs at job2 for years. PRN=more money. Luckily, no immediate family had a major illness, so the lack of health insurance was never a pressing concern. I worked my fair share of weekends and holidays, the hospital never did approve a FTE for my floor even though I basically was, so it worked for all concerned. All those left-over bills from nursing school and maternity leave were finally paid off, a bit put back, and I wasn't in fear of losing my license every night I worked.
You're almost done with the worst bit!!! Hang in there, and in two weeks have a night out w/ the hubby, relax, and sleep 24hrs straight, lol. It'll be worth it.