New to Herceptin

Hello. I began 52 weeks of Herceptin yesterday. I am a stage 3 bc survivor; 14/17 nodes positive. Er negative, strongly Her2 positive. I had a left mastectomy. I had 4 AC and then 4 Taxol, followed by 29 radiation treatments. My muga scan indicated a level of 52%. I had Hodgkins disease 20 years ago, at the age of 20. I need advicce on what to be looking for, etc? I feel pretty good, still really tired from radiation and chemo, though. I work full time, have two kids and am married. I am 40 years old. It's been a helluva year! But, thank god I am here. I really like and respect my doctor and believe I have great medical care. Any advice on things to avoid, things to be extra careful about, etc, is greatly appreciated. Your stories really inspire me. Thanks - Rose in Kansas