Lynchburg (3-4, 2-2 ODAC) outscored SU (4-5, 1-2) by three goals in the opening 30 minutes of play to earn the victory over coach Lindsey Lutz' club.
Shenandoah, which received four goals from senior Samantha Donaghy, cut the deficit to two, 6-4, on a Donaghy goal 5:07 into the second half.
This started a run in which the two teams traded the final five goals of the contest.
Junior Liz Bereit had that last goal for Shenandoah, scoring unassisted with 1:25 remaining, but the visitors could not climb all the way back.
Bereit won the ensuing draw and Erin Higgins had shot that went wide in the final minute to complete the offensive effort.
LC outshot SU 23-18 while the visitors had a 14-13 advantage in groundballs and a 9-7 edge in draw controls.
The two goalkeepers, Ashley Cross and Hailey Bossert, split 18 saves.
In addition to Donaghy's four goals, Bereit had a goal and an assist and Becky Bove a goal.
Samantha Sisson had an assist, including her career record breaking 75th in the first half.
Sisson fed Donaghy at 17:36 to top the mark that she and Jennie Ott '11 had previously held.
The women are up next again on Tuesday in a non-league contest at McDaniel.