I've noticed a developing tremor in my left arm over the last month that I've never had before, and it can get distracting enough to prevent daily tasks such as making coffee without spilks, and I've had a verbal stammering and stuttering problem. It's not severe, but I've become easily annoyed by small, simple tasks in my life and I'm uncertain what caused the onset. Is this an immediate concern, or one I can consult my family doctor about?