What Causes Metallic Taste In The Mouth With Abdominal Pain?

Hi....I have recently had a bad chest infection with bad coughing fits. Had antibiotics from doctor, then some diff tablets as after a week the infection hadn t completely cleared witch I m still taking. Past week I ve had this dull pain under my rib cage on my right side, I thought this was muscle strain due to my coughing fits. However, it s got worse, like a sharp stabbing pain, it hurt to breathe. It has calmed down after a day but still some pain there. I also have a metallic taste in my mouth and lower abdominal pain. Also experienced a sharp pain on my left side in my back. Not sure to this is related, but I ve just had my period, this was very light and only lasted a few days? Do you have any advice?