I do not have a primary doctor but my OB wants me to have a 24 hour urine sample tested at a lab and said I could have it done at OSF main hospital, is this true?

Yes. Your OB just needs to send the order over, or you can bring it with you when you come. Check in ad the main entrance and they will guide you from there.

Yes that is true. Have them fax the order to them so it is in their system.

Your ob can write and fax an order for u tbere

Yes, if you have an order in the system. Done it (too) many times.