ive never done molly but it sounds like the comind down off coke mixed with drunk regrets.
ive had friends who have experienced depressed moods the next day after doing ecstacy something to do with your spinal fluid or sum shyt. but if youve been high for 3 days straight that sounds like some meth type of effects. ive been high off meth for almost 5 dys straight in the past.
if your not high anymore and feel a "come down" its because your dopamine levels are completely depleted. take a brake try not to stress everything will heal with time. all you can do now is learn from this experience and tell the person that you had the confrontaion with that it was drug fueled actions and you regret it. but make sure to tell her that you know thats not an excuse for your actions but you have learned from it and ask for a chance to show her what the real(sober) you is about. everyone deserves a 2nd chance. but you have to prove to yourself and her that you deserve it.
good luck