I am smelling smoke at times and also urine as well and no one else seems to smell it. I have done a little research. Something mentioned Parkinsons and I have tremors probably once a day in my hand. Memory seems worse as well. I am approximately 53 years old, female. What do you think?
Unlikely to be Parkinson's.  Most of the neurodegenerative disorders are characterized by loss of smell, not alterations in smell.  There are many things that can cause alterations in smell.  If it concerns you them you should get it checked out