When it comes to your SSL Certificate, this is something that we provide for you by default - and should there be any issues with it, this would be indicated by an error message when trying to access your online store.
You currently have a password page up, so I was unable to look into your store/products, - but even coming to that page I see no issues with your domain, which would tell me that your SSL is also in order.
If you're ever concerned about it and you see some sort of error message when either trying to access your store, or looking at your domain settings in your Shopify admin, you can contact our support here and we can even look to provision your SSL to try and help this.
As I mentioned before, I was unable to see the store and products you sell due to the password page, but judging by that domain name I would guess your store specialises in bedding, or some sort of supplements to help with your sleep? I would love to hear more about this!
Lana | Social Care @ Shopify -Was my reply helpful? Click Like to let me know! - Was your question answered? Mark it as an Accepted Solution - To learn more visit the Shopify Help Center or the Shopify Blog