I am facing from quite wierd problems, i am blank all the time , i tend to forget things just like 30 - 40- secs after it , while studying , i just keep copying thin gs from blackboard , and camnt even ermeber what was the nlast line i wrote , even if i study constantly for 6 hrs or do a heavy workout , i neither feelk fresh or tired , its the same black and dizzy mind , i have lost my identity , i dont know how to respond to phone calls, i mean what to speak , when i go to shops , i am always confused what to buy , i am feeling sleepy whole day and cant think of anything , this has effected my personal as well as social life very negitively , is this fatique or nanxiety disorder or what ?