I used to be a warlock 5 years ago but became inactive. Recently I have been feeling rather strange. I can feel a calling, as if something is want me to step back into the current. My energy levels are at a constant high but I feel as if they can go higher to what they once were. When I allow the energy to go higher, it subsides making me feel faint. Does anyone have a reason for this?
You're just not used to consciously working with that much energy. Think of it like blood flow within a vein; increased amounts of blood flow that the vein has not adapted to will put stress on the vein. So the more you work with that energy, the more that vein can adapt to the new blood flows.