I was right there with you today Juju. I didn't really have anything uplifting to say as I'm pretty deep in my own quagmire of depression/regret right now but I just wanted to say you aren't alone.
And yes, pneumonia will do that to you, but fortunately, a quick course of antibiotics should clear it up pretty quickly and get you back up on your feet. Just remember to stay really well hydrated, helps to clear all the gunk out of your lungs faster (I speak both as an almost doctor and having gone through that several times in college).
Try googling positive break up quotes. Sometimes puts me in a better mood. Or puppies. No one can be sad and looking at puppies.
M:26 H:32 T:8yrs ILYBNILWY/ "I'm not happy": 2/6/16 D-Day-discovered PA/EA: 2/10/16 Separated: 2/14/16 He's living with OW I moved to different state: 06/16 Currently: Trying to move forward