Good and Bad News

First of all, I am going to say that my Onc told me and my Cardiologists told me it was totally fine to start exercising. Okay.
I ran Monday, ran Tuesday, and felt awesome, during and afterwards. Well, Tuesday night I woke up with a pain in my chest on the left side. Not just sort of pain, but excruciating pain. I couldn't sleep on either side because of this pain. The pain was/is totally different than lat time, in that its super painful. Last time, it gradually was painful. So, I woke up Wednesday didn't excercise and ended up calling my Onc in the late afternoon because I could hardly breathe. He wanted me to go to the ER and I wouldn't go. Last time it was such a horrible experience, in that you check in talk to a doc that has no idea whats actually going on, and its a run around. So, I didn't go. I called and spoke with my cardiologist twice in the evening and was assured that I was probably going to be fine.
I couldn't sleep well at all last night because the pain has only gotten worse. This morning after my rad, I got a chest X-ray and an Eccho again. The good news, my heart is awesome. The bad news, I have a moderate level of fluid in both my lungs again. I really don't think this is caused by me running, as if you remember a few weeks back I noticed the swelling came back in my ankles, which is a symptom of all this crap. I am over it!
I do not want to take predisone anymore. I am sick of steroids. I want to be get back to my slim and FIT body. I want to be pretty again. I am just so sick of the weight. Please don't write and say I will be soon enough, I know I will. I just am sick of it. SICK OF IT!! I was really excited to start exercising like a freak and get back into health.
I am not supposed to know any of this as I saw it on the Eccho, but am waiting to hear back from a DR who is allowed to tell me the info. I've had the eccho done enough now, that I can see fluid.