There was only one recently updated post.That's odd. Usually when I search normally I'm #2 but when using incognito I'm #5. Always thought that had to do with me owning/visiting the site so it got pushed higher when not in incognito.
I would say wait a bit, don't do any dramatic changes for now just keep posting like normal. When I got hit in last years December update I didn't recover until I removed a lot of the pages I had posted, was publishing pretty heavy the month before and I guess they saw it as spam. Think I published 10 language translations of nearly 400 pages that got them to nuke me.
Up until this afternoon (local time), the site was ranked 2nd, but a few hours later the ranking disappeared.
This site had stayed within the Top 3 for several months.