Is there something wrong with me?!

It could be your mattress. But it could be other things aswell. The reason a mattress will cause aches are the pressure points. When you put weight on the springs they try and bounce back to their original shape so they put pressure where your body is lying. Especially on the heavy parts of your body i.e. pelvis and shoulders.

Also if the mattress is too soft and doesn't support the spine while you sleep.

But then again the mattress might have nothing to do with it. I suggest you do some exercises and stretches.

you can take a really long bath with hot water if you are still achy go see the doctor.
you might be achy because you might experienced in cold then hot

Your body aches from being on the Internet for too much time (particularly Yahoo answers)

The cure: destroy your computer and never look back.

It very well could be I had that problem until I got a new bed XD

Experience with a shitty mattress

You would have to be more specific, how long has it been aching? what food have you eaten today?

.

Could have an allergy to some food or body spray or shower gell

Shower more?