Organic, Social and Referral traffic drop

[m3110w]

Hi All, I'm an SEO newbie helping with the site amritayoga dot com. On Oct 22 our Organic, Social and Referral traffic/sessions dropped to zero while our Direct traffic stayed about the same. I used Google Analytics to get this info. I'm now researching why but so far don't have any clear answers. Around Oct 22 I changed the category of some (maybe 20%) of our blog posts. Also around Oct 22 the big DDOS attacks started. Any thing else I should research about why the sudden drop in sessions? I checked and we have no Google penalty. I checked our Google Search Console and our "Total Clicks" numbers look steady with no big drops. Any insights on this most appreciated.

[m3110w]

Penguin dropped around Sep 23rd and my Organic, Social and Referral traffic dropped on Oct 22 (my Direct traffic stayed about the same). Because of the 1 month time difference, I'm guessing the drop was *not* caused by the Penguin update? Am I wrong?

Also the Google Search Console shows no drop at all in my "Total Clicks". Any ideas what could cause the drop of Organic, Social and Referral traffic? How should I research this?

Thanks,