Heather, You sell yourself short far too many times. You have the skills, experience and the know how and why shouldn't you raise the bar and ask for a higher price? You can always negotiate and work out something that is fair and reasonable, but when it comes to education...parents generally want the best and are willing to pay for it.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
