A Lunar eclipse is like three full moons all rolled into one. They often bring changes and closure. This may occur on the date or one month either side of the date. This eclipse occurs on the 18th in the northern hemisphere and the 19th in the southern hemisphere. I can't see your astrology chart but it will be strongly influenced by the house where that full moon resides.
Mercury turns retrograde - yes again on the 21st in Scorpio. It turns direct on 11th November. The shadow will remain in play until 20th November. Projects begun before Oct 6th will be fine, but do be sure to doubly check the fine print if signing contracts. Otherwise not a good time to begin a new business venture or job. The exception is if you are returning to an old boss or position.
So a great time to look within and to begin to tweak and change what you feel is right for you. This Scorpio energy will help you.