This happened in late October 2015.

I had a really rough 2015. I was dealing with the death of my dad who passed away November 2014. I was dealing with a therapist who abruptly stopped seeing me. That along with my PMDD a medication withdrawal and the stress of my job caused me to end up in the hospital in March 2015 for the first time in over 5 years. After that I started going to the groups I'm still in today. My doctor put me on Zoloft and I gained 30 pounds. I quit my job in May. In August my dog died and the day after that I got all 4 of my wisdom teeth out. That event scared me very badly even though the surgery went fine. In September 2015, my mom, my biggest supporter ended up in the hospital for 5 days. She just had vertigo but since I had recently lost my dad I was so scared she was going to die. She came home but couldn't drive for a couple of weeks. I had little to no other way to get to my groups or appointments. In late October she was able to drive.

A few days before she got the ok to drive, I felt this sort of feeling that I had never experienced before and I have never experienced it since.

I just felt really odd. The only way I could explain it was that I felt like I was living in a post apocalyptic world. I felt like my world wasn't real. I may have been starting to expierence my seasonal depression because It was getting colder outside. I was also confused by the reports about Hurricane Patricia and all my emotions that I had experienced throughout the year just came rushing towards me. This feeling lasted for about a week.

But I also kind of knew things were going to be a lot better in 2016. Which they were. 2016 was one of the best years I've had.

I didn't know what was going on at the time. I mentioned it to my doctor who didn't say much. But a few months ago I read about depersonalization. I'm pretty sure that's what happened.

Can anyone confirm this?

Why did this happen? Was it all the stress I had dealt with that year?