Hello @Cat2, and welcome to the site. I’m sorry you find yourself here, but you will find a lot of support. Most of us were overwhelmed at the start, but you can do this.
There are different chemo regimes, and I don’t know yours, but I can say I was mostly afraid of nausea, and had none. There is medication for this, and the general opinion seems to be that nausea is not the drama it once was. Of course there can be other side effects: your oncologist or nurse should provide you with information on how to minimise these. If I could give you one piece of advice it would be to exercise, exercise, however unappealing that may seem at the time. And @Afraser is quite right (as she usually is): it is time to put yourself first, and take help wherever you can. In fact, it is time to be assertive and ask for help. You might be surprised.
Best wishes.