No you are not alone. If, as I have, take my wife to unfamiliar places, or if you meets people she has not met before or for a long time it always causes a behaviour 'blip' soon after the visit. This can last for a day or so and sometimes involves mood changes. I always think carefully now if I take her to family gatherings or out for coffee etc. I still do this because otherwise I would tend to become isolated, but I am careful to consider the new essay of the occasion. A daily excursion to town and coffee help to acclimatise her to other people.I wonder if it is common with others. My wife has Alzheimer's and to give me time to myself we have carers for a few hours and also friends and relatives. I do however somewhat pay the price emotionally for the rest of the day and evening there is total confusion and wandering round the house ,I wish visitors could call round during the evening to see how things really are. I do sometimes wonder if it is actually counter productive.i do hope this does not seem ungratefull on my part.