I do not know if my symptoms are common for other people suffering from anxiety but I can go all day long with any anxious feelings whatsoever. I can be completely tired and rained from a very busy day but then the second I hit the pillow to go to sleep my brain goes into overdrive. I think about all things going on in my life or perhaps things that I did during the day that I should not have done. This then produces Nocturnal Anxiety Attacks because I keep waking up and sometimes I can not sleep at all thinking and being anxious.