Changed published font

Hi, so my website has currently gone a little crazy. To start my fonts in my navbar and headings went from a custom font to a generic one/non legible after it was published. Then I had a few plants in my preview but after I published it, it’s either disappeared or stacked on top of each other. Lastly when I check the site on my phone, the menu opens behind my image.

Any help would be greatly appreciated

Here is my site Read-Only: LINK
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