When waking up frequently at night

Since entering my 30s, I've been really worried about waking up frequently at night.

I used to sleep soundly until morning once I fell asleep.

Lately, I wake up at least once around 2 or 3 in the morning,

It takes time to fall asleep again, too.

The next day I'm tired and can't concentrate well,

Is there anyone else whose sleep quality has suddenly dropped like mine?

Please recommend any methods or supplements that helped with sleep.