Oh my gosh! I had the same thing!
I will never forget when we went back for our check ups about two weeks after we got home. My cousins husband drove us down there, and we stopped at a rest area to use the facilities. When I was done, I went out what I thought I remembered as the right door - but it was not the door we came in. I was so upset I was about in tears as I could not figure out why I couldn't find the car! Then I realized I had gone out the wrong door. I also messed up the time of my husband's appointment - again a memory issue. At my checkup, as Brad said, I asked about my forgetfulness and was told it was a side effect of the anesthesia. They said it gradually wears off, but could take up to six months for all the effects to be completely out of your system.
It seemed like it took a long time for my memory to return to full force. It just would improve incrementally over time. My job relies on my memory skills, so I was petrified that my memory might be permanently damaged. Thankfully, it wasn't but it just took a while before I really felt like I was back on my game.