I think the main thing is to remember that the first time is worst in that it is totally new territory: they are trialling you for neutrapenia so your WBC may drop dangerously, so you have to avoid sick people and probably crowds. And you have not yet got your balance over how it feels so get knocked for six again and again physically and emotionally. And because you are still finding out how YOU react to it and what actually helps each your symptoms get less or go away, finding out what you can eat, how to get to sleep, what to do with all the emotions that come up and overwhelm you. Plus you are training your husband family and friends how to help and hitting glitches. Plus you are getting to know yourself as a chemo patient: a balding person who is physically unwell and having trouble coping: not an easy person to love and accept and support.
If your oncologist has not suggested remedies that work for the symptoms that distress you or even that are mildly irritating, you can always ring and ask the oncology nurses or the breast care nurse or even the local pharmacist. Or make an appointment to see your own GP and ask for recommendations.
My first time through I was so distressed with reflux and insomnia and packing on 7kg literally overnight that I found it really hard to get myself back for the second dose. Had nightmares and a melt down a few days before and that seems to be fairly common.
I think that while symptoms may accummulate in the treatment cycles ahead, you will have a much better knowledge of how to minimise them so they won't be nearly so distressing. The first is the worst. Get through that one and you are most of the way to the finish line. In fact, think of it as a training period that will help you manage the cycles ahead.
The other big thing is to walk every day for at least half an hour, preferably an hour and preferably with a friend or family member, and to treat walking as your job, the one thing you must do. My oncologist strongly recommended this, and I found that days I did not walk felt heaps worse and I was a lot more emotially all over the place when I walked.