I'm worried about my blemishes.

Hello. I’m writing this because I’ve been incredibly stressed about my skin every time I look in the mirror lately. Sometime ago, dark spots started appearing one by one around my eyes and cheeks, and now they’ve become so dark that they aren’t even covered up well with makeup anymore. ㅜㅜ My skin tone used to be quite clear even if I just applied sunscreen haphazardly, but it seems like pigmentation forms more easily as I get older. I searched online and found that vitamin serums and whitening creams are good, so I’ve been applying them consistently for a few months, but I haven't seen any noticeable results. I’ve also considered getting laser treatments at a dermatology clinic, but I can’t bring myself to make a decision due to concerns about side effects or the cost. Do you happen to have any skincare methods that worked for you after struggling with blemishes or melasma like I did? I would love to receive recommendations for effective and cost-effective laser treatments. I would be really grateful if you could share any tips in the comments, no matter how small!