Why do I need very specific details?

(Chapter 11 Stress and Anxiety in my book)

I'm not really sure how long I have been doing this but I just remembered this happened earlier today. My daughter called me to finalize plans for Mother's Day tomorrow. She said that I could come over to her house around ten am for breakfast or earlier to play with the babies. I told her that I would see her tomorrow morning. A lot of times, I will see her on Thursdays and she will usually give me a time to arrive so the babies won't be sleeping when I go there. Today, after I hung up the phone from talking to my daughter, I wondered, “Is she saying that I can arrive around nine am, earlier or later?” I have no idea and I didn't think of asking her, but I know that sometimes I will ask her rather than guess what she means. I'm not sure why but for me not knowing an exact time creates a lot of anxiety for me. I really don't enjoy having this problem.

I know that living with MCI – mild cognitive impairment does affect my memory, cognition and comprehension. Because I don't really know what time to arrive, this might keep me awake tonight thinking about it. It is too late to call or text my daughter so I will just have to figure it out. The problem is I have no clue how to solve this problem and I don't even understand why it is a problem. I really hate living with a memory impairment. It adds so much stress and anxiety to my life, especially when I can't make sense of something. I know that from my own experience with MCI, that the symptoms can cause quite a lot of anxiety. I'm not sure if I will ever get used to it. I know that it doesn't always happen, just sometimes.

On Mother's Day, I think that I arrived at my daughter's home around 9:15 am. I know that if my daughter had just said ten am, I would have been fine because I would have understood that. It is because she added "or earlier to play with the babies", that made it so I couldn't understand. Did earlier mean 9:30, 9:00 or earlier?