I was scouting random paths yesterday and got mobbed by a bunch of strong enemies. Today I don’t remember where they finally got to kill me. I had a ton of souls and humanity on me and it’d be a shame to lose it.
Is there any way to find out where I last died?
No, there’s no way in-game way to lead you to where you bloodstain is. If you can’t remember where you died last then your only option would be to see if you can figure out the area you were at by reading guides or watching videos to see if anything sounds/looks familiar. I find this wiki to be very helpful, and it contains a list of enemies and areas. Looking through there may help you figure out where you were when you died.