Widgets disappered

Hi everyone my problem is I have lost my button widgets.
I had a simple widget all you have to do is drag it to where you want it, give it a title and a address to go to.
Example Title Blog Address https://www.fashioncloudboutique.com/blog
Then people who use your website just click on that Button to go to your blogs. I had two of these buttons one would take you to a page like i have explained above the other to a photo image.
My buttons have disappeared where i had them on my homepage and they have also gone off my widget list so I can not use them any more.
how do i get them back?.
My Site is https://www.fashioncloudboutique.com
if you look on my homepage at the bottom you well see Help And handy tips. there were buttons to click on under that to take you to the tips
All gone help please