Amy how scary!! I am so sorry :( I can't believe they let you out either. Please take it really easy and let Betty and Wilma take good care of you. *hugs* I will be thinking of you. Sending so much love your way. You are so strong.
If I were you I would call the ER or a doctor back up again and tell them about the headache and fluid build up overnight. I think it is important to keep an eye on it just in case. Hug hug hug hug