although i agree with aura about the humour, it really doesn't sound like you have any medical conditions. you are human, and it's perfectly normal to feel overwhelmed sometimes.
these days everyone will try to tell you that you have this or that, and should take some drugs to make it go away, or will try to sell you some crazy method for making yourself feel better in 10 easy steps.
how crazy is that?
feeling good about yourself is now another product we can buy.
what if you don't feel good? is that not allowed?
we all go through difficulties in our lives, and sometimes, it's ok to not be 100% ok. if we did not experience different emotions, such as sadness, pain, regret, love, loss, fear, then what would we know of true joy?
it would be just another piece of candy. if all you eat is candy, well... we all know what happens.
very often not feeling good about one-self, or about one's life, is actually quite a healthy thing to do. without this, we would not grow, or seek anything other than what we have at the moment.
what is bothering you in your life?
is there some person or event that you keep thinking about?
does this make sense?
what do you think... ?
there are people here who are willing to listen. even if they have different opinions than you, it may still come as a relief simply to express your feelings.
you are not alone.
write back if u feel like it, or feel free to PM me.
cheers!
-daniel