Angela,
You do squats with 20#, wow....yesterday I did my LBWO and tried to do the squats w/5lbs....hehehe....I had to put them down...I couldn't keep my balance. I ended up doing squats w/the ball against the wall. My PT should me how to do those. Hopefully as I get stronger, I will be able to add weights.
I am glad your headache is gone