Hello jr:
The only law concerning employment and pregnancy that I know of is the Family and Medical Leave Act
Here is just the overview:
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Covered employers must grant an eligible employee up to a total of 12 workweeks of unpaid leave during any 12-month period for one or more of the following reasons:
For the birth and care of the newborn child of the employee;
For placement with the employee of a son or daughter for adoption or foster care;
To care for an immediate family member (spouse, child, or parent) with a serious health condition; or
to take medical leave when the employee is unable to work because of a serious health condition.
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Looks like you're covered. Here's the link to the US Department of labor website:
U.S. Department of Labor - Employment Standards Administration (ESA) - Wage and Hour Division (WHD) - Family and Medical Leave Act
You might want to forward that link to your HR department, and tell them that you expect to hear from them within 72 hours.
That's what I'd do.
excon