SEO and Google ranking help for Shopify

I have a shopify store for a product that I'm not allowed to promote on adwords. Therefore, I can only rely on organic search. I was the first or second result until I updated my website, now I'm at the bottom of the second page and my sales have taken a nosedive. The copy I have in my meta data on my shopify settings isn't showing up on google (not a recent change so it should have propagated by now).