Hi In my experience, shielding can never get very efficient. It's good for short period of times, and then just visualizing is the best - sometimes combined with a stone like obsidian or amethyst (great combination). But as a long term strategy, it just doesn't work very well.
Instead I'd suggest learning an energy management skill that helps you have control over what energy you keep in your body/energy field. I use shielding on top of my other skills, but it's not very good on it's own. The bit where you feel flustered and confused, almost like you're floating is because you take on too much of other people's energy and you have no technique for 'returning' that energy. Understanding other people through empathy is great, but if you keep absorbing everything it gets harder to distinguish from who you're getting what and your own self start getting lost. Simple shielding is not going to do the trick.
updated by @nea: 05/22/18 05:12:13PM