I find I need to isolate and meditate. I meditate daily and find it to be very helpful.

Well I am not vampiric but I do get a sense of overwhelming feelings when I am in public places. I pick up on peoples anger and distaste so I begin to come down and it is hard for me to come back. So I try not to go out unless I am needed to.

Sounds very likely.

Aside from staying well-fed, I find sleep to be the best medicine. I often don't get enough of it, so once in a while I just take a whole day, (or in my case night,) to simply sleep.

As much as the whole idea of sleeping in a coffin has nothing to do with real vampirism, I sometimes wonder if it might be beneficial. Just something to keep the world at bay for a while as I sleep and rebalance my energy. On my off days, it just sounds practical. 

Do you have specific questions?  If I don't know, I'm sure others will?
You aren't stupid for not knowing something yet.

Empathic is the ability to feel other's emotions. Sometimes this can be overwhelming because an empath can have difficulty distinguishing whether the feelings are they're own or someone else's.

It can be a very difficult thing to live with, especially if you are flooded by negative emotions.
Some have difficulty going anywhere there are crowds because they cannot block the emotions and they feel all of those people's pain.

There are ways of "shielding" to help keep the empath from being overwhelmed.
A good site for learning very basic shielding is:
http://www.psionguild.org/pshield.html

To me a sensitive is someone with psychic ability. They "just know". They can be empathic as well, but are not necessarily.

You might wish to ask Bobby if that is what he meant by sensitive. I believe sometimes sensitives can feel spirits as well.

I hope that helps.

I usually go outside away from people to clear my mind and spirit. I sit and take long deep breaths in through my nose and out through my mouth. I do this for at least five minutes.

I know at school its like hell to get me "calmed down" but serious meditation helps