I got huge sudden decrease in SERP on two different websites that I own. Both of them got multiple Negative SEO links that I didn't do with the Anchors that are related to my website so google probably is thinking that this is done by the website owner/3rd party service. I've disavowed the links (actually I am doing this almost each week, with more then 1000 new links in every submit). nothing is helping. What can I do? there was an google algo update 3-4 days ago? what websites it was effected and how can I recover?