Walaal, whatever it is that is making you feel this way, just know you are loved by Allah, by your family and by those near to you.
Before anything else, my first advise would be to seek out help. Don't think you have to shoulder this on your own, talk to family or friends.
If you feel you are in an acute situation, go to the ER but don't let yourself dwell on those negative emotions and let them boil over in impulsive actions. Try to calm yourself, this is only a moment and it will also pass.
Every life is precious in the sight of the creator and this life we live is an Amaana from Allah, that we should cherish, be grateful for and make the best of.
You are tested in this very moment and every other moment as long as you live, embrace it walaal and you can weather whatever storm comes your way.
Whatever Allah tests you with, he deems you to be his beloved servant that he knows is strong enough to carry on, no matter what the circumstances are.
What you are tested with is ultimately temporary. Either it will loose the intensity or cede all together in this life or you will be cleansed of your sins as a reward for your endurance in the next.
By the qadar of Allah you may see unexpected changes for the better, In sha Allah.
You have Iman in Allah, of that I am sure. As you said yourself, you need to work on your Salah, an important pillar of your Islam. We can all relate, walaal, but don't see this as a reason to doubt Allah's infinite mercy to forgive all your shortcomings, for indeed he is oft forgiving.
The daily prayer will give your day structure and can iron out things that contribute to you feeling this way, such as a bad sleep-schedule etc.
Take it step by step. If you feel like it's been years since you prayed, maybe just start by making wudhu and recite the verses above in a Mushaf or listen to the recitation of your favorite Qari.
Follow the links included in the quotes to read and listen to the verses of the Qur'an, you can change the reciter in the settings above.
In sha Allah your heart will feel the soothing effect of the Qur'an.
Take care of yourself my dear sister, we will all keep you in our prayers and In sha Allah you will feel better.