Without knowing the precise language of your contract, it is impossible to give you a yes or no answer. You mentioned referred to your monthly pay...

Can my employer deny me using PTO hours to take off 6 days (once a week for 6 weeks) for childbirth preparation classes?

Your PTO issue with your employer may be covered, among other things, by the Americans with Disabilities Act, the Pregnancy Discrimination Act, and...

Do employment laws apply to myself as owner and employee of my own company?

This is a fairly broad question that can't be answered in an internet post, but the short answer is that yes, some will apply to you based on the...