Carrying identical twins should you be working in a warehouse, there isnt any light duty there or able to sit down when you want to?

Work related: Health issues as yours need to be dealt with at your workplace, there should be a health clinic overthere for consultation regarding reassigning another role according to your current health status, if not or don't have a primary doctor to deal with that, go to free health clinics or Medicaid for help. What we do her is just give an advice, won't be of any help, wish you a healthy pregnancy

Consult work HR: The rules involving accommodations for health issues vary with the size of business & type of employment. If large,it may be required to offer different employment. Small businesses do not fall under the same rules & some may be allowed to terminate you if you cannot perform your usual tasks. This is really something you should take up with the businesses human resource department.