Truly sorry to hear about your loss.
This reminded me of the incident happened when I was 15. It was summer time and I decided to visit one of my friends holiday resort (My first time there), one day we were chilling by the beach and I decided to take a swim. I walked to the dock by myself (I was the only one in dock). I decided to run to the end of it, and dived in headfirst. Unfortunately the sea depth was even shorter than my height so I smashed my forehead to the bottom of the sea, immediately after I went in.
I don't remember the rest but my friend told he saw me lying on the dock unconscious with my face bloodied up. I don't know how I made it back on the dock, must be a natural reflex or something. Either way I'm very lucky I survived that day