I had an acquaintance reach out late Saturday night to ask if I was able to do a favour for an important event they are having this weekend. It is a craft that I do. I said I would be happy to help and would do the task (for free with them providing materials) today as this is my day off. I messaged them about 2 hours ago and they let me know that they still wanted me to do this job but that they were having a medical issue (which I'm obviously sympathetic to) and would drop off the supplies "later". I've not heard anything since and as the day goes on I'm worrying I just simply won't have the time to finish it to a decent standard. I feel terrible to let them down, particularly as they are unwell and likely stressed planning for the weekend.
I'm a people pleaser by nature and do struggle with boundaries (I know, get a backbone!) but I am finding this situation really tricky and would appreciate some advice as to how to tackle this politely/kindly as I will have to have interaction with this person in the future and don't want things to be awkward.