Yes, I agree that it sounds like she is realizing this is the "last" year she will be living at home. The "Last" everything. I recall our daughter being like this during the Christmas of her Senior year of High School. She still did not know what exact college she was going to be at, but she knew it would be far away.
She was very verbal about saying, "Mom, I am going to miss you." Or "Wow this is the last "January", I will be home all month long. "Everything is going to be so different next year." "I need a hug." It was that excitement and being terrified all at once feeling.
I started talking more about what I did in college and more of the experiences I had. She seemed to be more interested than she had in the past. My husband and I both, kept telling her what we had always told her. "Just do your best and do not worry." "You always do a great job."
"If you have questions you can always call us or ask an adviser at College."
Our daughters main concerns.
Would she like her room mate and would she find friends?
Would she be able to do college level work?
What if she failed?
What if she could never pick a major?
Were we really going to be able to afford for her to be up at college?
What if she wanted to come home?
Was she going to shame the family if she did not succeed?
All of this was easily answered by reminding her, we were already proud of her, she had already surpassed our expectations, She is a nice person and would be surrounded by others with her same interest and this was an adventure, so just enjoy the time and continue to "just do her best."
They turn into needy kids again. Lots more hugs, more alone time, more conversations. Speak with your husband about this. It will be like one long drawn out PMS.. for this next year..