I've had temptations to feel pride, as well temptations to go to the devil and call him lord, and I feel something inside my chest that pulls me there, to say and think such things. Likewise, I feel the love of God after a good time praying. Well, to be truthful, I haven't felt it in two years, since I entered this high period of scrupulosity and was convinced I was hellbound for compulsive thoughts.

Am I alone, in having these feelings? Is it all mental? I once escaped from these thoughts before and thought of them and had the feeling, but I was able to brush it off and say no, whatever.

Once those thoughts enter your head, just ignore them and keep up praying.  The devil doesn't like to be ignored. He actually feeds on your fears. Best thing is to keep praying regardless of the uninvited feelings. The more you keep thinking on those feelings, the more power you actually give to them, until they cause you a full grown obsession.  A Hail Mary is always useful when encountering those uunwanted thoughts that fly like bugs around you.