Anna, my spouse has a similar 'where am I' behavior. I usually reassure her where she is and go on to the next subject, such as "Hey, would you like a cup of hot chocolate?" My mother use to contend that if you asked questions, you were in control. But, there are times when she wants to 'go home' though we are home....and then she goes off, grabs some clothing and puts it into travel bags putting them by the front door. I consider it a minor delusion. The delusions that come in the middle of the night where 'she swears her brother is breaking into the house and he has 'killed' 5 people and we have to get out NOW!' are harder to deal with.