I wish I could wave my hand and make all adoptive parent guilt go away.
Unless of course you've done something post-adoption to feel guilty about
LOL
But seriously, you were never part of the problem (unplanned and/or ill-timed pregnancy) nor were you part of the solution. Adoption was the solution - not you. You were just the best person to parent her baby when she couldn't. There's no guilt in that.
Let yourself off the hook for that one ((Hugs))