Unless you are using a different browser or incognito browser, what you see in search will be different to what I will see, even using the same search term. Many different metrics go into the search algorithm for each individual.
You opened in the busiest time of the year. New sellers also get a higher search rank "honeymoon" so they are encouraged and get some traction on the site. But that comes to an end when you are moved into the main selling pool with far more competition. Visits and sales tend to ebb and flow.
I'm far from confident giving any advice about SEO but I think you could improve your titles. Having different labels on each candle/melt is distracting. A uniform label with the same font, style and format would help with a cohesive brand across your range. Take a look at other candle makers. Don't copy them but it will give you ideas on how to present and market your products in photos. Your photos are not enticing me to buy. I didn't click through but the props don't seem to match the scent. You have some wonderful photogenic ingredients that would look enticing.
I'd also rethink your slogan "Let's burn together" too. It needs more context.
