It's best to listen to the professionals on this one.
From my own experience, however, I would say its dependent on your perception of your thoughts. For a thought to be delusional it would usually just have to be the cold, hard truth to the person. When you think these things, are they the gospel truth or are they just strange thoughts intruding on your normal thought stream? If when you thought them they appeared to be the absolute truth (i.e. you believe them as much as you believe you are a person living on the planet earth), then perhaps they might be deemed as delusional and so it could be a symptom of a psychotic disorder. If, however, you thought 'wow that is a bit odd, i wonder where that strange thought came from', then you started thinking about the thought and obsessing over it, I would think that you are likely more a victim of an over active imagination and a great deal of anxiety.
Psychiatrists and psychologists love to label things as psychosis because it puts them in a little box, however the human mind is very elastic and has the capacity to mould itself to all manner of ideas and experiences without them being particularly pathological or with a distinct pathological cause.