According to your other thread all you are eating is Diet Pepsi and salad.
Yeah that's not a good thing right there. You're starving your body, unless you're having more than just that. If you are concerned about how you are feeling, take the time to pull up a site on the basic requirements for the human body and then compare those stats to what you are eating.
It may help with this problem. As I can see right now, it's your best bet, because pesi and salad isn't going to do it.
Hope you go to your doctor soon. Best wishes