Some will, some won't. You're possibly better off talking to your GP about it @Butters. If you have a breastcare nurse you could have a chat with her about it.
Two nights before my first chemo I had a massive panic attack. It was just dreadful. But I did it and I got through it. And the rest of them. For most people it's not the horror show it once was. Some people even breeze through it but for most of us it's grotty but doable.
Hang in there. It's the unknown that's the worst part. Once you're underway and you know how your body reacts, your emotions will get better. K xox