“There are times when a person feels the stirring to return to G-d. He wants to begin to serve G-d…. At such a moment he has to face the full force of the evil inclination. It takes great strength and persistence to withstand this new evil inclination which seems to be born afresh at every turn… ‘for the greater the man, the greater his evil inclination.’ (Succah 52a) It is a great thing to seek to draw closer to G-d. That is why it takes renewed efforts at every moment to fight this new evil inclination which keeps being born afresh with every passing moment.” ~ R’ Nachman of Breslov
In other words, don’t be surprised if the evil inclination is at it’s strongest right after Yom Kippur. This is a good sign. It means you have reached a new spiritual level. Stay strong!