Wake up Crying!!!

Has any one cried in a dream and then woke up and had tears in real life.? Something strange happened in my life for the first time today, i woke up at 4:00AM. had dream this morning,actually it left me feeling drained, uncontrollable feelings ,i felt horrible i was actually crying, crying even when i am fully awake and sitting here and writing my blog. i was in shock for a bit and could not sleep again... i am having a headache now, have to get ready for work after some time...but i am so clueless...why it has happened. It is not unusual to feel and exhibit emotional responses in dreams. After all, who hasn't had a nightmare that frightened the sleeper to near-death? I have woken feeling upset, stressed or with the major feeling of sadness and with lot of Why????.What i experienced today is left me disturbed for a while. staring my day again......hoping day will be okay after a night and morningmare.