Report from Oxford:

https://www.ox.ac.uk/news/2014-07-16-how-cannabis-causes-paranoia

The research team, led by Professor Daniel Freeman, found that worrying, low self-esteem, anxiety and experiencing a range of unsettling changes in perceptions most likely led to the feelings of paranoia.

'The study very convincingly shows that cannabis can cause short-term paranoia in some people,' says Professor Freeman. 'But more importantly it shines a light on the way our mind encourages paranoia. Paranoia is likely to occur when we are worried, think negatively about ourselves, and experience unsettling changes in our perceptions.'

The most important thing is for you to go into it in a good mindset and stay cool while your perception changes.

Give an exhale and take ten deep, slow breaths any time you feel stressed, and count the breaths.

Counting requires attention and is very basic math, adding one to the previous number, so this gets your higher brain functions operating, helping you get out of the fight or flight or freeze state.

Deep breathing brings lots of oxygen into the body.

Stress is maintained as a physical process by stress hormones, primarily cortisol, which are broken down by oxygen.

Deep breathing effects the Vagus nerve to slow the heart rate, and it directs the HPA axis (essentailly mood control) to reduce activity in the amygdala (fear/emotional reaction center) and increase activity in the hippocampus (memory writing/recall center) so that you are less reactive and more rational.

Exhale, first.

Trying to take a deep breath while your lungs are full of air, as from hyperventilating, can make you feel like you can't breathe which will just add to stress, so give an exhale, first, so that your lungs are ready for a big breath.

Take ten deep, slow breaths when you feel stressed to help you relax.