Hi emhernan,
I'm sorry you are having a rough time right now. It's not uncommon to feel awful after a migraine attack, let me explain.
A migraine attack has four phases; prodrome, aura, headache and postdrome. However, not everyone will experience each phase. For example I rarely experience aura, but do get the other three. The last phase called postdrome can last anywhere from a few hours to days and leave us feeling awful.
During postdrome we can feel 'hung over' and down, moody, irritable and have trouble concentrating and more. Take a look at this information on the four phases of an attack; https://migraine.com/migraine-basics/migraine-phases/.
I hope this eases your mind,
Nancy