Sorry I couldn't wright to you earlier.
I'm happy you didn't had such a bad experience with the test.
First about paracetamol. Yes, it has anti inflammatory properties, but, for that purpose is usually used with dosages of additional non-steroidal anti-inflammatory drugs.
It's a major ingredient of Tylenol.
Usually, it takes time for results to come through, because cells from the bone marrow sample need to be stained with different staining techniques (takes a couple of days) and examined under a microscope.
Have you been performed other tests, too?