The feelings of "going insane" when out in a crowd, mall, grocery story or wide open space were the same for me (probably most here). This is due to sensory overload. There is so much for your eyes to take in and for the brain to process all of what you see when in these environments. Good news is you will get a handle on moments like these, it takes more time for your healing, five months is still early. Cleaning house causes us to "look down" alot and this will stretch neck muscles, the constant head motion involving neck and occipital muscles we put them through by looking down, up, head turning, looking up, unconcious tightening of jaw and tongue muscles, etc. puts a strain on nerves. You are also challenging your eyes that have alot to do with balance and then you get sensory overload bringing on headache, pinched nerves due to tight muscles, etc. It MIGHT help to be more concious of these muscle groups throughout the day so you can self massage them into relaxation, or just take five or more minutes to sit and close your eyes (shutting down the sensory overload) bringing on relaxation to the head and neck muscles (propping my head on pillow when I sat facilitated neck relaxation). I spent a good part of my healing days with eyes closed here and there so I could function (not with the same energy as the "old" me) with less strain. I also remember running my fingers up and down alongside the incision, cross-fiber frictioning on the incision and occiput area to keep down the scar tissue as much as possible helping also to keep those muscles as relaxed as possible. Self massaging my scalp helped too, along with meds, I took over-the-counter to assist in times of "big" pain.
I wonder if you got the ANA package? This will help in educating your husband, family members into all that we go through, plus sometimes it's just hard to find the "right" words to explain. Please know you will improve, now perhaps not back to the way you used to be, but you will keep moving forward from where you are today, tomorrow and the next. Just need to rest for short periods of time more than you did before. AND, to heck with what other people think of you, time to put your arms around yourself for comfort because others cannot possibly know all you are going through, showing up here every now and then helps too.