I have been very tired, experience somewhat of a brain cuttoff (can't think of what i'm trying to say) sometimes, and other symptoms. any ideas?

Many causes: Sleep deprivation, medication side effects, depression, hypothyroidism, pregnancy, the list goes on. You may want to see your md for a workup.

Are you under stress: Lately? If there have been major stresses in your life ( death or serious illness in your family or pressure at work) it might explain the symptoms. If you are not under stress or just to be sure there is not a physical reason, speak with your physician and get a check up. Good luck and let us know how you are doing.