I hate my job

I need to vent. So I work as a 3rd shift caregiver, and I used to LOVE my job. one of the easiest in the world, because I work in a behavioral home, and my clients usually sleep throughout the night. anyway, so yesterday we got a new client, and this company has turned into an absolute shit show. I'm scheduled for a 12 hour shift (I'm almost 16 weeks pregnant, but that's fine) and I just checked the schedule. it shows I get off at 10am and NO ONE else is scheduled for the day. my husband is in jail and the jail asked me to come in at 1130am. I called all the staff I knew and the next staff comes in at 12. how unorganized is that? I'm scheduled til 10, then there's a supposed 2 hour window before next staff comes. I asked her to come in at 10, but she said no. she's not that kind of person to come in... this certainly isn't my fault, and isn't the first time this schedule fuck up has happened. like I saod, I'm 16 weeks pregnant, been here since 10pm, and can't even get off at my scheduled time. I've NEVER worked somewhere this bad and unorganized. maybe it's lack of slwep. maybe it's hormones, or maybe it's cuz I'm just done, but I'm about to cry, and I don't know what to do. should I call on call? or just play it out? I also have a second interview I'll miss if I stay.