I am so sorry to hear this, hope it's not cancer!
I have stage 1B EGFR NSCLC as well, with Visceral pleura and Focal lymphovascular invasion. Sept 2023 had it removed. I didn't have chemo and straight to Tagrisso 80mg. My last CT Scan showed a few small nodules, and I will have another CT at 3/7/2025.
Just wondering, why you had your brain MRI done? any symptom?
I will pray for you!