Why isnt my clothing site converting anymore???

Shopify is good place for getting merchants of clothing.
Everything is not easier and efficient to do as you want. Everything needs hard work for getting popularity and respect.

OP i think you should focus more on marketing and improve your web content/products .
add more new style clothing, i think why they dont buy from your website because your products is not attractive.

It feels to me that you also need to spend more time on engaging your users and creating new ones. Shoutouts might not be enough anymore, as you may have lost a certain amount of traction with your target audience. I'd recommend investing in AdWords and Facebook campaigns, as well as investing in someone who can run these campaigns for you.