What things genuinely help you when your mental health feels awful? (Not asking from a self pity perspective, just for distraction suggestions)

I genuinely don't remember the last time I felt this panicked or upset. I feel like I've genuinely lost any ability to feel completely safe or think positively, and that kind of worries me as whilst I can be a bit pessimistic, I usually try and have some element of hope most of the time. I'm usually fairly okay mental health wise but every two months or so I will just have a period of two or so weeks where I just feel completely flat and depressed. I have a support system, but I don't specifically go to counselling etc.