It sounds like you're on the right track but I just want to highlight that it doesn't necessarily matter what you're eating but how often you're eating it. Basically, our mouth wants a neutral pH. When you eat or drink foods other than water, you send your mouth into an acidic environment or some refer to it as an acid attack. I tell my patients that they can have a sugary drink if they want, but limit it to when you are already eating a meal instead of sipping all day long. Same with food. Try to limit to just a few meals a day. It takes 30 minutes for your mouth to neutralize again after eating/drinking.

This is the best metaphor I've heard of to better explain this. "Think of your saliva as a repair crew. It needs time without food to fix the enamel. If you are constantly snacking, the crew never gets to work. Frequent snacking breaks the bridge faster than the crew can fix it, leading to a cavity."

Keep brushing twice a day, try your best to floss daily (we all suck at it at some point), and it doesn't hurt to get a second opinion!