For me, free floating fear is like feeling an undercurrent of anxiety under the surface all of the time, but you don't know why it is there. It doesn't feel like it is connected to any specific problem. It feels like it is just THERE. It is an uncomfortable physical feeling. For me, it is usually in my solar plexus or intestines. Because it is under the surface, and is not as strong as outright panic or anything, if you stay busy with other things, you can almost not even notice it is there. But if you are quiet and try to be mindful, you will feel it. It also might keep you from falling asleep at night or wake up in the middle of the night. It is hard get rid of because you can't pinpoint what is causing it. For some people who have had a lot of stress and traumas in their life, this free floating fear is nearly always there. It feels normal to be keyed up and on guard. Sadly, then when you do have a few moments of feeling peaceful and happy and safe, that also makes you fearful, because then you feel like you are vulnerable and open, and any minute something bad could happen to take away that peace. At least that's how it feels for me. I've been diagnosed with GAD (among other things).