main menu disappeared

Hello!
I have an ocean theme wp —–theamericanquarterhorse.com
I went on my website—And I was trying to put a social media plugin on a footer bar.
I found several that didn’t want to work or didn’t work the way I wanted them too. Finally I found one that worked the way I wanted. The plugin I was using—“social media widget standard” was perfect, however
when I went to the site to take a final look, my main menu was totally GONE!!
I figured there probably was a conflict, so deactivated the plugin. When I deactivated the plugin, the area that had held my main menu –between –“the american quarterhorse” and the page title—“home” had turned blue to match my main background color.
I reactivated the plugin and it turned back to black to match the rest of the header like I had it set before, but no menu.
So I re-deactivated it, and deleted the plugin hoping my main menu would return. When I did the area totally disappeared, and “the american quarterhorse” and the “home” were sort of “smished” together-the space where the menu used to be was totally gone along with my menu.
My menu is definitely in the dashboard, and I hit “re-saved” to try and make it do what it was supposed to do,, but nothing..
I asked for support help, and someone noticed that the mobile menu—which had never been there before—was in the right hand corner.
I went in and checked my menu—it was there with ‘main” checked, all my pages were there and “public”.
I went into appearance—customize—menu—-mobile menu is NOT check—-main is checked but not visible on the front end no matter what I do, and I cannot figure out what bar–header setting went between “the american quarter horse” and “home” where the main menu used to set., and why I have a mobile menu and it is not checked.
I admit I am a newbie, but this is really frustrating, would appreciate any advice.
Thanks..

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