NOTE: Many of you ask questions about transiting Neptune. I have an article on this on this website under TRANSITS. Read this article as this article is only about transiting Neptune Retrograde.
Similar to the natal retrograde Neptune, the transiting retrograde causes sensitivity and receptivity to be much more acute. Due to this heightened receptivity, we are allowed to see far more than is possible when Neptune is direct. This is possibly a result of augmented intuitive or inner vision that bestows a different and more insightful perspective on matters.
JUNE 26 through JULY 3 2016: Neptune R squares Saturn in Sagittarius
When Neptune turns retrograde, our feelings are more astute at picking up and perceiving the illusive. It is easier to ascertain information about issues that have eluded us while Neptune was direct. Delphine Jay feels that it is essential that we do something about the problems that we pick up on while Neptune is retrograde because they can worsen when Neptune goes direct. I personally have noticed that, if you do not work on an internal level while Neptune is retrograde, you will be plagued by feelings of disillusion and vague dissatisfaction.
As one's perceptions become more acute, it is important to listen more, listen to the "inner voice," so that you can see more of what is going on around you. It is essential that you talk about what you are feeling, sensing or absorbing because Neptune retrograde can produce a type of psychic overload for very sensitive people. Heightened sensitivity can be both an asset and a liability.
It is important that you avoid drugs, chemicals and stimulants while Neptune is retrograde. Protect yourself by refraining from associating with addictive personalities, psychic attractions, and overwhelming people who drain your energies. Wearing black tourmaline can funnel off negative energy and psychic attack. If you feel a little paranoid during the retrograde period, it may be that you are picking up too much from your external environment. As an asset, this period is excellent for using and cultivating your psychic perceptions. I am not aware of the augmentation during the retrograde period but I am aware that my abilities seem to diminish when Neptune turns direct.
source = http://www.lynnkoiner.com/astrology-articles/neptune-retrograde-2008