"Not to sound like a whining baby but...What to do when a priest seems to be mocking you? "
Funny that you say that; I've felt something similar- not recently, but about a 1& 1/2 years ago. I remember getting a flat tire two separate times when I walked out to go to my car after Mass. Looking back, I felt this heaviness, ...every Sunday morning an hour before Mass. On one specific occasion, during confession, it sounded as if he had laughed at me (only for a couple of seconds) when the context was serious. When I would meet him after Mass, everything was like normal again. The weirdest thing... I just realized the effect was that I was hating going to Mass, and would miss Mass on a frequent basis.
What helped me was re-interpreting my anguish of soul into an opportunity, to love God more purely based on faith. Meaning at that time of my life, I was being tested by God and was allowed to suffer to bring me to love Him for Himself. I was stripped of loving Him because of some guy dressed in cassocks... the vestments... the liturgy (natural motives); now it was to make a supernatural act of faith and believe in Him alone. But, this is really half the battle.
For me, I had to get to the point of very specifically doing everything I can to be in the state of grace then (evening before/ morning of), get God involved and be very clear in directing your intention (can't be half-asleep and vague). Then, direct with all of your human willpower (and be very specific) that you want to offer your anguish of soul in union with the merits of Jesus and Mary to the Eternal Father so that Jesus may experience love today, starting with yourself. Or.. you might unite your anguish of soul to the merits of Jesus and Mary for grace to be given...somewhere in this world for the conversion and eternal salvation of those Jesus and Mary want most to know Him, to serve Him, and to love Him. So what you are doing, is taking Satan's black magic and using it against him mystically and on the supernatural plane - not the natural one (fighting against him using only your reason and 'smarts').
For me, it was a test of my Faith. You see, you're taking that negative energy against you and (like alchemy ~ turning !@#$ into gold) re-interpreting it.... changing it into an opportunity for grace to be given to the world - imitating Jesus who did the same for you and for me (with His sufferings during His mortal life)... for us... You'll start to notice that 'heaviness' starting to break. Satan, instead of destroying you, now has his power turned against him.
There are a lot more things you can do (I've done); but I would be here with another 2 pages of techniques you can do to fight back. And I might add; you are in a war and need to realize that the war is being brought to your very doorsteps; although invisible. A battle of the wills so to speak.