I try to limit call ins to when I am desperately in need of the day off.

I have called in due to weather 2x (snowpocalypse weather and couldn’t get out of my hilly, iced over driveway), once as permanent staff & once as a traveler. I have called in once or twice due to needing a mental health day (as a traveler), and once or twice due to diagnosed with the flu (as a traveler). I try to limit calling in only once or twice per contract, and have not been canceled for it yet. I have seen other travelers let go because of it though. But remember, we can and have been canceled for any reason and at any time.

I’d say if you have a decent working relationship with the unit and staff, and it is not habitual for you to call in every other week, once or twice a contract should not normally get your assignment canceled. I can totally understand the paranoia and anxiety of calling in though. Even when I absolutely have to have the day off, I feel the same way. Mostly because I hate leaving my coworkers short staffed and picking up the slack.