If you go to a health food shop, you might be able to buy mild relaxing herbs like valerian. Lavender oil is amazing and even though i have access to sleeping tablets i prefer to use that on my pillow. It is good for general anxiety in the day too. You can buy diffusers to puff out steam with essential oils into the room. Different oils have different abilities. Drinking chammomile tea or valerian tea, some do. Sometimes you can buy these in a supermarket.
There are over the counter sleeping tablets that are milder, but still pack a punch. It might be useful for when really struggling but you wouldn't be able to drive once taken them.
St John's Wort is a health food shop type of antidepressant and in Germany, doctor's do prescribe in for depression as it is quite powerful. I think health shops dosages must be lots less but it is a herb that has been used for decades, maybe longer, my grandma used to take it when she was young so 100 years ago.