Welcome @ HelenSusie7.
The beginning is terrifying. Scattered emotions, overwhelming fear and a brain that just won't quit with all the negativity. It's perfectly normal what you are feeling.
Chemo is the big bad boogeyman of the trip. It's the unknown that's the worst part. Some of us get through quite ok, I worked as well, and was able to continue on with life fairly close to normal for the majority of the time. Once that first one is out of the way you'll feel a bit more in control.
All the best.
xoxoxoxo