One of the first things to recognise with Parkinsons is that we are all Unique in our own symptoms that we have. for others it is different, some have no tremor, but have other problems
It is not unusual to feel light headed, but for me only the tremor strikes a cord, stress, tiredness effects tremor and can amplify it, you might not be able to detect it, but, tremor effects the entire body, most noticeable in our hands,legs,feet,face we can have a tremor internally.
But this alone doesn't make it 'parkinsons' it can also be essential tremor or other types of tremor.
I had tremor as a feature for a considerable amount of years, i ignored it for quite sometime as just that and got on with life as just one of those things age bring's on, but then it became troublesome to impossible, i noticed also that i had started too slow down, and had become slow, physically and mentally burnt out and uncoordinated. fatigue was playing a major part when i had been a very active person I was dead tired but unable too sleep with vivid nightmares.
it was at that point i could no longer ignore the obvious that something was wrong and sought answers with an appointment. the process of diagnosis begun.
The best thing you can do is take that step, see a doctor, it might not be what you fear, either way you'll have piece of mind. Only a doctor can diagnose you i'm afraid, it is natural to try & seek answers for your intuition people will support you along the way to its outcome.