Frustrated with a Traffic Drop

I don't know what is going on, but my search traffic is down anywhere from 1/3-1/2. It is frustrating me beyond belief!

I started investigating things on my site last week and this weekend to see if there were any sorts of errors anywhere. I did discover my structured data plug in wasn't really working like it should, but I don't think it ever has been so I can't blame that per say (I've been working with the plug in support to get it going, but I still don't know if it is working to show any rich snippets in search. I've requested recrawls of pages but I still don't see any...)

I went back to my most popular posts that seem to have taken a hit lately and updated them. Reread them, took out some fluff, added where necessary. I created YouTube videos for two of the posts. Submitted for a recrawl.

I don't know if it's realistic to expect to see a quick turnaround, but I definitely haven't seen any turnaround yet. :(

Above is a graph of my impressions (teal) & clicks (blue) according to Search Console over the past 3 months. You can see a big dip at the end.

To say I'm frustrated is an understatement!

I know Google released an update at the end of September, but from what I can tell I don't think there is anything about my site that should be all that affected by it.

As far as my overall rankings, they seem to be fairly steady:

I'm confused and frustrated right now. But I'm just going to keep on working and plugging away.

Anyone been in this position before and have some advice for something to look into?