I once felt very similar to you, but not pertaining to Catholicism. I felt this perpetual cycle of anxiety in all aspects of my spirituality while I was practicing the religion, and even after leaving for many years. One day I just had enough. I had to face my fears and allow myself to question why I was feeling this way, question my religious leaders, question God, question the bible. I questioned everything. I researched anything I could, found people dealing with the same issues as myself, and found a whole new appreciation for my current life and the beautiful planet we live on. I still have so much to learn, but I just take it as I can.

I have personally found that going to church leaders during this time of deep conflict may not be the best option. Look within, be honest with yourself, and be gentle with yourself. Your fears and worries are valid, and you will get through this!