O my word what a disaster @garokee I now know that feeling of loss and annoyance.
At least in your case it was equipment failure. In my case it was a dumb mistake which should never have happened!?
Some good lessons to learn from this.
1 Back up everything...twice lol
2 Don't waste time thinking about it.
3 Find a solution.
Well, we've learned our lessons the hard way. :)
You can get in the habit of taking a few shots with your phone as well as your main camera. Then have it set so Google Photos automatically backs up all the pics from your phone.