While I agree with the things emotionallydrained has mentioned they are essentially logical, things you consider when calm and unemotional.
At the moment your emotions -or anxieties if you prefer - are running flat out giving you all the doubts and feelings you describe.
Logic will not work. The sorts of things that do are activities, exercise, doing things you know you have liked in the past, hugging and playing wiht the kids, and lots more along those lines.
There is one thing I use when I'm stuck and my worries are in a descending spiral, and I'm panicking. I use a free smartphone app called Smiling Mind.
Now I'm not that big a believer in most of the things you find on phones, however this one is reputable, non profit and even used by the NSW Education Department among others.
It get one to focus away from immediate troubles into a small world with just enough activity to calm a brain. It did take a bit of practice -but works. Even the 2 minute demo does some good (though there are lots of other things, some adult, some for kids.)
I have the attention span of a gnat, and Smiling Mind can be set to give me a gentle reminder about the time my mind starts to wander.
I'd suggest you give it a bit of trying and see how you go.
Dear Livingthedream22: Trying different ideas can be good, and by posting them up there is the chance for discussion, exactly what this place is deigned to do, no need for apologies