Contrast and MRI: Did you have a reaction? How was it handled?

Months ago I had a MRI with contrast and had a terrible reaction. Yesterday, July 13, 2023, I refused the CT scan with contrast. Consequently, the results were not clearly defined. I’m told, and am scheduled in October, another MRI with drugs to offset the reaction I had last time. Has anyone had a similar experience with the contrast and then had drugs for another MRI? If so, did they work, meaning no reaction to the contrast. I feel as though I’m between a rock and a hard place. My CA19 is 3, so this is not cancer related. They saw enough that I am still cancer free. Any information would be appreciated. Thank you for reading this.