Welcome dobe,
just googled for the anapana sati sutta, which contains all the instructions for the practice you do, and was surprised to find even a wikipedia entry on it. Pasted from there:
Core instructions
First Tetrad: Contemplation of the Body (kaya)
Discerning long breaths
Discerning short breaths
Experiencing the whole body (sabbakaya)
Calming bodily formations
Second Tetrad: Contemplation of the Feeling (vedana)
Being sensitive to rapture (pīti)[11]
Being sensitive to pleasure (sukha)
Being sensitive to mental fabrication (citta-saṃskāra)
Calming mental fabrication
Third Tetrad: Contemplation of the Mind (citta)
Being sensitive to the mind
Satisfying the mind
Steadying the mind
Releasing the mind
Fourth Tetrad: Contemplation of the Mental Objects (dhamma)
Focusing on impermanence
Focusing on dispassion
Focusing on cessation
Focusing on relinquishment
How do i know if I'm merely hypnotizing myself? Should I stop focusing on the tip of my nostrils and pay more attention to my entire body, or am I doing fine with the nose approach? Anything in particular I should be aware of when I get this sudden rapture? tips/suggestions/critiques/comments all greatly appreciated
Self hypnosis could happen, but then this only becomes a problem if it happens in every sitting.
Contemplation of the breath or the whole body are equal stepping stones, which in my experience is a gradual evolvement spontaneously proceeding. After many years I only start with the breath, which then takes each of the steps naturally. With patience.
Rapture I could only overcome by getting used to and no more excited.
If you experienced a jhana you would know, since it so otherworldly with a very long after effect giving peace for weeks.
regards
This is a very good synopsis of Anapana and the dangers of hypnosis are well expounded by pamojjam. It doesn't mention noses. Feel your whole body as you breathe. The body is the first of the personality factors every time the Buddha lists them.
Don't think about Jhana. Let it happen when you are ready, It's a distraction until then and when you experience it, as pamojjam also comments, you will know it.
Welcome.
Matthew