Ask for the missing practical detail
“See you later” may leave you deciding the time, place, travel and expected length yourself. Ask for the piece that matters to you. You do not need to explain a diagnosis to ask an ordinary planning question.
Keep one version of the plan
If information is spread across messages, put the final details somewhere you can find them. That could be a note, a calendar entry or a saved message. Choose the system you already use, rather than starting a new one just for this.
- Where and when.
- What to bring or do beforehand.
- Who to contact if something changes.
Give yourself an alternative
A backup does not have to cover every possibility. Decide on one useful fallback: a different route, a shorter visit or a message you can send if you are running late. If leaving early would help, you can mention it ahead of time.
When the plan changes
Ask what is different and what still applies. You can take a moment before committing to the new version. If it no longer works for you, say what you can do instead. Clear communication helps people understand your choice; it cannot guarantee that every plan or relationship will feel easy.