When to quit your job?

im a newbie here in UAE,2 months working now in this company as a nurse,its a medical center.We have almost all of specialist in the center. We are working 8 hours a day, we assist doctors, we take approvals for patients insurance,we informed patients for their lab reports by phone,and do duties that the usual nurses do.In 8 hours duty most of the time i was in a defferent area like for ex. the 1st 4 hours im in derma then the other half im in GP doctor,in short i don't have fixed area atleast in a week. Now im having problems with my works ,like pending in insurance approvals because i dont have training for insurance applications ,pending reports for patient.Im having a hard time following up my patients.Staff are toxic most of the time,. Now I want to resign from work,for im so stress at work,im not happy anymore,and sometimes i cant sleep thinking about the undone pendings,Im getting emotional and crying at times when im so exhausted.And i even lost some 4 kilos in two months.Please can you advice me if it is right if i resign? or Im just emotional ? or its normal thing that happen? ive been working before in KSA but its not the same as here.Guys i need your advice.😞😞😪😞😞