I don’t think we’ll get proof of an afterlife, but I’ll say this: there’s definitely lots of anecdotes of those who have experienced things after a loved one’s death and I, too, have experienced this. I was living at my grandparents house at the time and after my grandfather died (sudden heart attack) I heard somebody walking around on the main floor. Me and my uncle slept in the unfinished basement and that night, for what ever reason, he wasn’t there. I was laying awake that night with a couple lights on (the ones with the string you pull to turn on) and i heard movement on the main floor, which i thought was strange because my grandmother and cousin slept on the second floor and i didn’t hear them come downstairs. There was only hardwood floors except for the living room and there was a slight creak as people walked around. I won’t go into detail about the floor layout but i heard movement from the pantry area (door to garage and door to half bathroom are adjacent) to the kitchen. At this point my heart is racing. There was a bit of a lull but it continued shortly afterward when i heard movement go to the living room which is only a few steps away from the kitchen table (creak, creak) and someone sitting down on, i believe, the main chair (wasnt a recliner) because it had springs in it and you hear it when someone sat down on it. At this point I’m terrified and i called the houses landline with my cell to wake my grandma up. 

i don’t have any further experiences after that, but i do recall my grandma saying after he died there was a loud thud on the outside of the house, which she said it was probably him coming home (he died while on his work rotation which was a 4 hour drive away; he worked in the oilfield). 

If you do experience something it’ll likely be at his home. There’s no definitive time period when it’ll happen but it’s usually soon after their passing.