Please imagine your doctor orders you some laboratory tests and you go to a pathology laboratory. The secretary asks you how can we help you? You respond:
I must get a (blood / urine / etc.) test.
I must have a (blood / urine / etc.) test.
I must give a (blood / urine / etc.) test.
As a test I examined blood in all three structures and got some hits, but the problem is that I don't know which one is natural in this case.
I would appreciate it if you could help me find the best choice here.