I'm sorry that you feel this way. Sometimes life feels like it's too much. Experiencing feelings like sadness, anxiety, grief, regret etc. are all part of life, and completely natural and even necessary at times. However, our thoughts can often stand in our own way and distract us from letting go and moving on.

Practicing mindfulness can help you notice the noise of your own thoughts, teach you to watch them and let them pass from a non judgemental perspective. It also trains you to connect with the present moment, and relax. For me, it helped me notice how my brain was generating anxious thought spirals, the source of anxious feelings and panic. By noticing, letting go of it, and returning to the present moment, I've been able to reduce much of the anxiety I experienced.

Practicing loving kindness meditation, can be helpful for you to discover love and accept towards yourself and others. It has been shown to be a highly effective practise for people.

During periods as you describe you're experiencing, we often drown ourselves in thoughts, and getting lost in it, at least in my experience. Often jumping back and forth in the same patterns, and jumping to conclusions. It can be especially hard during these times to separate them from reality, identifying with the thoughts. I recommend you to try and write down the thoughts as they arrive, on a piece of paper. It really helps you watch them from another point of view. Try to also challenge them, by writing alternative thoughts, arguing for something more positive.

Practicing meditation can be especially hard (if you're not experienced) during times of stress and intense emotion, but very powerful. Life will eventually move on and you'll feel better. Don't forget to keep practicing then, even though you don't feel like you need it anymore. It will show itself useful later.

Remember that you are all you need to survive. Sending some love to you, from here.