I Started Vyvance About 3 Months Ago. I'm 18 And

I started vyvance about 3 months ago. I'm 18 and I take it every week day when I have school. I also have chronic migraines. About 2 and a half months in during a final exam I experienced a migraine on the right side of my head and within 2 minutes the entire left side of my face began tingling and became numb like it would from the dentist. It's happened 3 more times since then and made its way down to my face arm and leg all on the left side, Im confused because 2 of the times I had not taken vyvance or had a migraine. Is this normal from vyvance or could it be happening from the migraines or maybe a different reason?