Hi Adrienne
it's hard to believe but there will come a time when it will all seem a long time ago. Don't concentrate too much on what's a year ahead ( I had a year of Herceptin with no side effects), keep your energy for the here and now.
Your feelings are normal but little by little most of us adjust to this new reality, and bit by bit we cope. Lots of people here and wherever you have treatment to advise and share tips.
Write things down or get them in writing so you can read or clarify when you have time and inclination. There's a lot to take in. Have someone with you if you can for appointments about treatment, so they can help remember all the details.
Very best wishes