When my son was 10 montshs old, my husband went back ato work (he's a teacher) after being home all summer. My son was "off" too for a feww days. I ended up taking him to the pediatrician since he just wasn't being himself. When he physically checked out well, she asked if there had been any changes at home. I mentioned the return to school and she said simply, "he just missest his daddy." WOW!!!
We made sure that Daddy had a significant amount of play time each night and made a major production of when Daddy came home each day. That was all it took. When Daddy when back to work again last fall when Chase ws 22 months, it was barely a blip on mu son's radar.
I do know that when I went to DC with my 8th graders (I teach part-time) for 4 days in April, I called to talk to my son each morning and again during bedtime rituals so I could get my good-nights in. I also bought a book for each day I was gone (since my son LOVES to READ). It gave him something to look forward to each morning and then he read it with Daddy each night and I asked him about it when I called. It made my trip a fun experience for both of us!
She won't be scarred - she just misses him as I'm sure you do! Good luck!