My personal time thoughts is that if a time machine that could go forward and backward in time could exist, then there is a first current time and a last current time. In other words, there is a set number of “frames” of time, so you could only go forward to a certain extent, and you could only go backwards a certain extent. The time at the very front (AKA the furthest forward in “time” frame) would be the first time to invent a time machine, and would use it first. Until this point, everything that had happened in all of these “time frames” would have been the same, but as soon as each time started interacting with other times then the time frames would all be different, because people from each “time frame” would likely be affected by people from another “time frame”. I have no evidence to back this up, this is just my current fantasy about what everything would be like if time travel is possible.
I personally am scared of spiders, but I’m also pretty much scared of (or at least heavily avoid) anything venomous. I’m okay with bees, though, because as long as you don’t threaten them they shouldn’t sting you (and yes, i know bees aren’t venomous)
I am sorry for your loss.