Hi @christina4!
First, the non-Magickal answer:
If it’s depression, seek professional help. Are you in therapy at the moment? If so, do you find that’s helping at all?
The Magickal answer: Mind, body and spirit are metaphysically interconnected 
and anything that benefits one aspect will benefit all three.
Do a deep cleaning of your space and your body. Dust and sweep every room. You can use sea salt and a broom or a charcoal mixture. Also see the waterfall ward here. 
When you’re done, take a warm bath with sea salt, Epsom salt, pink or Himalayan salt, and lavender. Light candles and incense with the lights turned down and play your favorite guided meditations. Meditation is an essential part of Magick and it can do wonders.
Try spending more time in nature, go for a hike everyday and exercise.
If you have a deity, connect with them on your altar as much as you can. When you have any bad thoughts about yourself, think about what your God/Goddess would say in response. It’s very much like talking to yourself as you would a friend. Try writing these thoughts down and journaling!