Assistant Issue

I have an assistant who is a lovely person but tends to chat too much to me and is overly helpful. I am very independent and just want to get to work in the am. I arrived yesterday morning and she was in my office and I was trying to quickly get to my computer but she was right in front of it. She wanted to chat and said “how are you this morning” and I said “ I’m really under the gun today” and she seemed hurt. I know I should have taken the few secs to say the right things here. And now I’m beating myself up for it. Should I apologize?