I am having severe headaches, left arm weakness, and sudden quick blackouts. Who should I make an appt with? I am also continuously losing weight

You have a # of. Problems. If this is occuring acutely please be transported to the emergency room now. Is you primary care provider aware of these episodes - if not, is imperative that he/she be informed asap. These are very serious sx - especially w your hypertension ; cardiomyopathy.