Hubby's first bone marrow biopsy next week. I have questions.

Hi there.  I'm new here.  My husband, age 65, was just diagnosed with Type B Lymphoma.  His first oncology appointment is next week and he'll have a bone marrow biopsy at that time. My husband is confident and his attitude is great.  I'm more nervous about all of this then he is.  He's not in denial though, he's just feeling optimistic.   Back to the bone marrow....Hubby has only read about what the Mayo Clinic says.  Mayo says "you may feel some pressure" and "there may be some pain".  So, he's figuring on going in there and turning down the offer for a sedative.  He expects to feel "some pain", but nothing he can't handle.   I have read other more personal stories where people speak of screaming in pain,  passing out from pain, feeling pain like they've never felt in their life.   I have not said anything to him about what I've read, I see no reason to scare him for a week.  Here are my questions.    When we get to the doctor's office should I strongly encourage him to take the sedative?   Should he refrain from eating for a few hours before the appointment?   How is he most likely to feel afterwards? Our drive home from the doctor will take about 90 minutes.   I appreciate any advice anyone has to offer.   Thank you!