Not feeling well... past 2 weeks waking up with a dried mouth and taste of iron, a sensitive smell i cant even stand…

Not feeling well... past 2 weeks waking up with a dried mouth and taste of iron, a sensitive smell i cant even stand coffee. Chest hurts and i cant sleep without a fan on im always tired and my eating habits have picked up. I feel sick around certain food and tea dont taste the same to me no more. I have headaches and this heartburn kills me every 2 nights. Smh whats going on.?