I think i accidentally urinated in sleep last night. i drank a good amount of water before sleep and was extremely stressed. could that have caused it?

Yes: Isolated episodes of bedwetting at night (sleep enuresis) are likely more common than we realize and can be related to a number of potentially causative factors: emotional stress, poor sleeping habits; excessive fatigue, increased fluid before sleep (especially alcohol and caffeine), medications, sleep aids, particular dreams, etc. Rx: Reassurance, identify and correct possible cause(s); monitor.