Could there be a technical bug or glitch on my cart page that's causing people to leave? How would I even check that?

I've been losing sleep over my cart abandonment rates. Every week, I see hundreds of people adding products to their cart, but only a fraction actually complete the purchase. At first, I thought it was just normal e-commerce behavior, but the numbers are getting ridiculous. My ad spend is high, traffic is decent, but something is clearly breaking down at the cart stage. Is it possible there's an actual technical issue preventing customers from checking out? Maybe a loading problem, a broken button, or some weird responsive design glitch on mobile? I've checked the cart page myself and everything looks fine to me, but that doesn't mean much. My gut tells me there's something happening that I can't see – some friction point that's silently killing my conversions. I'm running a fashion dropshipping store, and every abandoned cart feels like money literally disappearing. I need a systematic way to diagnose what's going wrong, because these lost sales are killing my margins.