Oh Dear Erin,
I'm so glad that your Dad is home and that they've given him the rest of the week off. Whilst I was reading the beginning of this message, I was thinking that perhaps it could be something with his lungs that backed up into his heart. Occasionally, pulmonary problems can cause cardaic enlargement. I'm glad he's with you and your Mum and is getting good care.
Please don't worry about coming here and venting. We've all had our share of problems over the years, and have come here to share. I'm glad you did.
You are all in my thoughts and prayers,
Chris