@whiteblankpage,
Hey
I'm so sorry you have to endure this kind of situation. Intrusive thoughts is a symptom of an underlying mental health issue. You should immediately consult a clinician and get diagnosis. You must understand your condition first before you can actually treat it.
From what you have mentioned your case looks like depression but this is only a speculation and you'll need to be professionally evaluated to be certain. In the meantime focus first on the things you can do to improve your mental health. You should start with some self-help methods.
Here are some things you can do to help alleviate the intrusive thoughts you experience. First is to do some meditation, mindfulness or positive thinking, and watch or read inspirational stuff. This will help you focus more on the good things.
Second is for the irritation and anxiety. Try herbal teas and relaxation exercises to calm your nerves. Also consider taking up Endoca hemp products. It has anxiolytic and antidepressant properties that can help with the anxiety. It also has a calming effect so it can promote sleep.
Last is once you get diagnosed your doctor will prescribe a medication so make sure that you commit yourself in taking the meds but don't rely on it alone. Do therapy as well.