Hi there- thank you so much for chiming in to share this challenge regarding spelling related to your migraine condition. This sounds similar to brain fog and aphasia (the challenge of finding and pronouncing words), both of which are frequent symptoms of migraine: https://migraine.com/living-migraine/aphasia-brain-fog.
I write articles and create videos for this site and have struggled to find my words (both in writing and in speaking) during an attack. Migraine is a complex and comprehensive neurological disease that can cause many symptoms. Not being able to find or spell your words when poetry is a way that you enjoy expressing yourself must be very frustrating. We are here for you and we're glad you're with us. Warmly - Holly (team member)