My son had an MRI with contrast when he was 10. No side effects. He said the worst part is it was loud. He said that he closed his eyes and pretended he was in a video game. Try not to worry...It's not so bad. Hope all is well.
Magnetic resonance imaging (MRI) uses a strong magnetic field and radio waves to produce detailed, usually 2-D images of the inside of your body. An MRI scan should take between 30 to 60 minutes and is carried out by a radiographer. You can drink and eat as normal before MRI. The procedure is painless, but can be very noisy.
The only side effect is that the injection may make you feel hot and may give you a funny taste at the back of your throat. This is normal and should pass quickly.Also regarding allergy to the dye,a prior patch test and skin test are done to see whether you are allergic to dye.
Hope this helps.Take care and pls do keep me posted on how you are doing or if you have any additional queries.Kind regards.