Scared Shitless 😱😨

It's 2:48 in the morning where I live so my husband is asleep I tried sleeping but woke up to some knocks we are renting a room and the room is right next to the front door and because it's hot we have the window open but its covered with a blanket and the only way it stays open is by a metal rod due to the window being broken any who I was woken up by knocks I laid in bed quietly and a corner of the blanket was moved and showed out front now I'm laying there expecting someone to say something but then I see someone trying to look through the little opening of the window I pretend to be asleep but keep one eye open and I see a woman with black hair I swear what I saw was clear as day I woke up my husband and told him someone is at the window he stood and looked for a few mins and saw nothing did I just see a ghost? Because I know what I saw and it scared me now I can't sleep