Possible Parkinson’s Disease Misdiagnosis?

I am 74 years old and I was diagnosed with Parkinson’s disease in 2019 at the age of 69 years old and I still do not have any symptoms of the disease, no constipation, tremors, pain, I do feel dizzy often and fatigued and blurred vision at times but I am sure that the blurred vision is not due to a disease like Parkinson’s disease. I have no tremors at all, I do not have any problems with my bowel movements.
My neurologist said it could be a disease that is similar to Parkinson’s disease. What could that disease possibly be to mimic the symptoms of Parkinson’s disease? I think he was lying to me about the diagnosis and the disease. Or else he made a mistake in his diagnosis and he sounded like he was trying to come up with something that sounded logical, which it didn’t make sense to me.