If you have to report to work in less than 8 hours after your previous shift, is there any sort of compensation you're supposed to recieve by law?

http://www.laborcommissioner.com/faqs.htm

I am not aware of any Federal or Nevada law that requires a minimum number of hours between shifts. Scheduling is left to the discretion of the employer.

In fact, with a very few industry specific exceptions, I am not aware of a law in ANY state requiring a minimum number of hours off between shifts.