RE: She must have felt me
If you were at the top of the ditch and she was at the bottom, you may have been skylined. What kind of cover was around/behind you? Otherwise deer do have excellent peripheral vision and maybe she just saw a slight movement from you - maybe clipping on the release, a slight change in footing on your part, etc. The wind was probably a factor as well. I would probably stay out of there for a few days and then drop in when the wind is perfect. Make sure you have some good cover around you and you should be set.