I'm worried about freckles on my face; please recommend a laser treatment.

After returning from an exciting summer vacation, I looked in the mirror and saw that the melasma and blemishes around my cheekbones and cheeks had become very dark. I have been extremely stressed lately, so I am writing this inquiry.
Even though I tried my best to apply sunscreen meticulously, playing under the intense summer sun caused my existing blemishes to darken and even new freckles to appear all over my cheeks.

Even after applying whitening essence and using face masks, the pigmentation seems to have settled deeply, and there is absolutely no sign of recovery with home care alone. Therefore, I am requesting a consultation to seek the help of professional dermatological procedures.
Considering the condition of my skin, which has become sensitive and irritated due to UV rays during the vacation season, I would appreciate it if you could recommend a customized laser toning or whitening treatment program that can effectively remove darkened melasma and pigmentation without putting strain on the skin.

I am wondering if it is safe to receive the procedure immediately after my vacation without causing any strain on my skin, and how long the downtime is that interferes with my daily life.
I am also curious about what precautions I should take to prevent the side effect of pigmentation becoming darker and to maintain clear skin for a long time.