I concur with this. You'll likely find its amazing how transferable your skills are to other jobs. Experience counts for a lot, even in a new field. Some of the best staff I have ever worked with have been "un/low qualified" moms returning to work for example with extraordinary organisational...
Good luck to you that's all! Thats a lot of years left, and if its making you unhappy, get out. Think of like changing halves at half time! I am of a similar age (well a little older) and doing something quite dissimilar to what I have done in the past. I've had to take lower pay for a...