Oh my goodness - that's terrible! I feel so bad for you. You're sick, you have no balance or stability and now you have 2 broken ribs?
I am so sorry this happened to you. It happened to me twice since I've been sick.
Once I was leaning over a sink, washing my face and when I stood up to scrub, I just kept leaning backwards (could not stop myself from falling backwards - weird feeling) and plumb fell over. I hit the back of my arm bad, but it didn't break. The hardest part was the soap in my eyes and the bruises I got.
The second time I was standing on my front porch and I just plumb fell off. i hurt my leg badly but it didn't break.
It was scary to have this happen.
Hang in there and I hope this passes soon.
Peace and health to you.