You have not learned properly the handling of energy in healing sessions. You should never use your own energy for healing others. Energy is available around us and everywhere. You should learn to use that energy and project it where you think the healing is needed. That's why the hands are a good conduit for drawing the energy and projecting the energy or think in another way, draw the energy from outside thru the heart chakra and run the energy from the heart chakra to the hands where there are minichakras in the middle of palms and comes out and being projected where you want it to be.
My way to project energy can be done in three ways: 1. I visualize the energy passing thru my hand from the back of the hands to the face of palms and I visualize it changing to positive energy/healing energy when needed and with the visualization power I project it where is needed; 2. I draw the energy thru the heart chakra to the minichakras in the palms and projecting it thru; 3. I don't use hands in this method, I visualize a vortex of energy in fron of my eyes and I pull it gently toward my tip of the nose and then with my eyes I project it forward where is needed. In all these 3 cases I never use my own energy, and I only spend my own mental energy to do all these processes thru visualization.