Wanted to chime in since I have had this going on for the past month and I have had a depression AND thyroid issues going on along with D and C issues. Have not been able to answer questions and have been completely "lost" for a better word. They are fixing all my out of whack hormone and vitamin issues, but it will take a while until I am back to "normal." I felt like a complete idiot when I can't help my kids with 5th and 6th grade homework or even answer the question "what's your favorite food?" I have no idea or at least I haven't had I have been in such a fog for the past month it has been horrible. I blamed everything on the depression luckily I found out it wasn't just the depression, but it was thyroid, D and C issues. It may not be your case, but when we start to act differently after being on meds for a while we should look for a medical cause and I am glad I did before it got worse.