Welcome lurkeycakewoman - sorry you're joining our ranks, but know that there are lots of very knowledgeable ladies on here who are going through, or have gone through this, and where all here for when you have a question or just want to scream and vent! Any questions you have, ask here.
Do you have a breast care nurse yet? They will always help with support and answering your questions.
It's good you're having a picc line, as once it's in they will take bloods and give you drugs through it, so they won't be repeatedly stabbing you! I had a port fitted, and while I was freaked out about it and very frightened, the group here helped me through it, and I'm glad I had it in (I have awful veins and it would take multiple goes at getting cannulas in or blood out- which was stressful for everyone involved!).
Do you know what chemo drugs you are having yet - if you let us know, we can probably give you an idea of what to expect. I was terrified before my first session, but can honestly say that the anticipation and fear of the unknown was worse than the actual treatment, which was fine (and the chemo nurses take fantastic care of you). With my chemo, my immune system pretty much gave up, and I got a lot of infections. Other people sail through with few side effects - it's very individual how you react. Because I've only recently finished chemo, I received an NHS letter saying I needed to shield myself for 12 weeks. I would ask your nurse or consultant what you are able to do- I imagine they will tell you that a walk might be ok, but shopping is a no-no, but again, this depends on your drugs and response, and they ate best placed to advise.
One of my biggest fears was the idea that I would be vomiting uncontrollably - I was so relieved that the anti-nausea drugs they give you when you have your treatment worked really well and i just felt a bit of nausea the first time. I told my nurse and was given different anti-sickness drugs from then on, and they worked really well and I had no further nausea. Make sure you tell them if you have any unpleasant side effects, as most can be treated with medication, so there's no need to suffer unnecessarily!
Good luck with everything - let us know if you have any questions. Even in the middle of the night, there's usually someone about to offer a hand hold.