Is MRI Needed For Being Claustrophobic And Having Anxiety Attacks?

Hi. I have been having several symptoms for a couple of years and have recently gone to a neurologist. I have an Mri of my brain scheduled for tomorrow. The issue is, I know I am claustrophobic. I had an anxiety attack in a Disney ride a few years ago. I turned down the sedative because I didn't want to inconvenience my husband and am now regretting that decision. Have been obsessessing about this all weekend. Is it worth it to try the MRI or should I just reschedule and order the meds?