hello guys i have a problem in seo i own a website i launched it 2 weeks ago it was running good even in google search was appearing fine so i changed the design of my website and changed some text of my content and edit pages name and i edited the css files and made some improvement for my site two weeks later my rank in google and bing start getting down some times its move up by one rank and in few hours its move down and in bing its doesnt appear anymore so i dont know how to solve this issue and im a noob in seo please i really need a help thanks in advance

here is the link maybe you need to check out the pages source code or css files code: we-talk.co