I am sorry, but not a good person to ask. I know there is a scan called a DAT scan which is a brain scan specifically for PD. I would think a regular MRI would not be the same. Do you live near a major medical center or university? You definitely should see a specialist if there is a possibility of PD or other serious condition. I hope you can get good care in help.
There are other tests a specialist could do to identify possibility of PD.