It taste like I have a penny in my mouth,what con I do?

Your symptoms are referred to as Dysgeusia, which is used to describe a "distortion of your sense of taste". This is a symptom of a problem, the causes are numerous. Everything from medication you are taking, to Zinc deficiency, and things you have eaten.

Sometimes people undergoing Chemo have this problem, people using products like Albuterol to treat their asthma, etc.

You need to speak to your Doctor to run through the list of possibilities.