Hey guys

I just launched a site on 5 Oct. It was a tool site and it has about 500+ pages on launch. Everything went smoothly till 21 Oct. Earlier we were getting about 5 to 10 clicks. And on 22 Oct I audited my site and changed a lot of things on the 21st. I changed the title and description of 300 pages on 21 Oct. So on 23 Oct I found something fishy my clicks and impression went to less than 20 which was around 1000. And what I see is that mostly all of my pages go to crawled currently not indexes. It comes suddenly I don't know what caused this.

Is there any way by which I can recover all of the pages ? This happens only in google my bing is working normally.