9 weeks pregnant . under neurologist for chronic migraine for years . first migraine with aura whilst pregnant , after vision returned short spell of tongue tingling . never happened before should i be concerned or is this part of migraine ?

Your likely diagnosis is the Classical Migraine variant, where auras, with or without headache can occur. These can vary in extent and complexity over time, but typically the ocular component initiates the sequence followed by numbness, tingling, or cognitive issues involving speech and focus, all of this lasting about 15-20 minutes. Discuss therapeutic interventions with your neurologist.