Ouch

Well today I went to the city near my little town and was trying to return books for textbook buyback and I had to park far away. I have 3 bulging discs in my lower back but I thought if I had the weight evenly distibuted that it would be okay. I walked 3 blocks and by the time I got to the store I needed to sit but couldn't. I started shaking and I still had one more stop to do.
At my second stop I chose to use a regular cart rather than a motorized and I was shaking and in so much pain but I kept pushing. No pain  no gain, right?
 
Well I will be paying for this excursion for awhile. I am still hurting and shaking. Going to go do some time on the heating pad.