Am I Losing My Ability?

I can sense energies. It varies, at times I can tell if it is negative or positive, and other times I can't tell the difference. Last December I sensed an energy in my new apartment. It stayed in one area and would just watch me, it felt harmless so I just acknowledged it and let it be. It however, did not seem to like my roommates or their dog. When they arrived it began following me everywhere I went. And it teased the dog. He would bark at corners, the wall, or stand in the hall and bark in a room. He also refused to come into my room. My roommates said at first it was because he didn't know me. But then when he came near my room he would whimper and cower and run away. He even began doing that when I would go to pet him. It got to the point I had to ask the energy to leave him alone. I moved out after 2 months because of problems with my roommates, the energy disappeared as soon as I had decided this. While looking around for new places, one particular place had a small hidden door in the closet that at first I thought was cool. Until I opened the door and felt an immense rush of negative energy. I told my friend I was done and left the house. I have felt more energies here and there in random places, especially at work. The energies that surround my work, especially at night is amazing. But until recently my ability has somewhat depreciated. I have been very stressed out and so overwhelmed from work, school, and personal issues that I haven't been able to feel anything. I can't even feel the ones at work. Is it possible that because I am so overwhelmed that I have some sort of block?