Herceptin side effects?

[KsGal]

Hi everyone. Im sorry I am so full of questions, but this is all so new to me. My doctor has scheduled me for a "loading dose" of herceptin next Wednesday morning, and I have to be at work at 2 that afternoon. He seems to think that I will be fine doing that. I, however, would like to ask all of you if you have any side effects from Herceptin the day of treatment, and if there is anything I should do to prepare for it. Do I need to ask for any antinausea medication or anything?
Also, I told the doctor I was having some little mini panic attacks, and he gave me a prescription for Ativan. I thought this was to make you sleep? Is this really something I want to take when I am at work, etc? Thank you all for putting up with me and my incessant thread posting.