Free Traffic Legal Advice

My grandfather had a medical emergency last night. I was called at 3am by my grandmother who just shouted down the phone that he’s having a heart attack and come quick. I drove safely the whole 10 minute journey, which mostly consists of a 70mph bypass with a small stretch of road being 50mph due to air pollution (has been average speed check area for a couple of years). I was so panicked and just continued at 70mph. At the time I just thought it’ll be a £100 fee and a speed awareness as I’ve never had any driving issues previously. However, I thought afterwards (when discussing the medical emergency with police officer who was required to take a report as it was so sudden) that it could be a much more serious punishment as I was significantly over at 70 vs 50. I didn’t even consider it at the time, likely due to panic and also the fact that it doesn’t feel like it’s speeding as such as it’s not due to danger. Like I’d never dare to speed above 70 or go faster than the limit in a residential area.

To make matters worse, I arrived at the same time as the paramedics who said my grandfather was dead. My grandmother is unwell herself and a fraction of the size of my grandad so her guided CPR was not effective, this is sadly why she was so determined to get others there asap.

What may I be facing? I’m really struggling with the death along with this anxiety.