Hi Jude, I just had a long response half written, & with my dodgy fingers, hit something & lost the lot, lol.
Welcome. You've come to the right place to ask questions. You will get answers.
I can't help with the herceptin part, I didn't have it.
A lot will depend on what particular chemo you have. Ask, ask, ask. The oncologist & oncology nurses will be able to help. Listen to their advice. Always aim to have someone else at appointments with you. They will pick up on different things than you do.
one thing I would recommend you ask about it different delivery methods for your chemo. I opted for a portacath, as I knew venous access would be challenging. Although I only had 6 chemo cycles, I have never regretted that decision.
Take it all one day at a time.
Take care, & stay in touch
Lyn