I'm due to do the Maire Curie Swimathon this Saturday. It's in memory of a relative who died. And to empower the charity that failed to help us in our "hour of need" because they didn't have the resources. I have a horrible chest infection and I haven't been able to train. I'm worried about my breathing on the day as I'm not sure I could can keep up to it. Technically I can complete the 5k over a number of days but I feel I need to do it on a day specified for my sponsors. I have had amazing support but I have 3 doctors telling me not to it do it because of my medical condition right now. Aibu to have to consider changing the day I do the swim?