Mid 40s and feeling old?
Wow!
I had just had my 5th child in my mid 40s and now, at 73 with all of them settled and 9 GC plus 3 GGC doing well, I have a new lease of life. I feel good, I'm (fortunately) very healthy and the world is my oyster...so to speak. So much to do, see, taste, enjoy and hopefully for many years to come.
Perhaps the OP could sit down and write a list of things that interest her jobwise and and look to enhance her credentials by getting additional qualifications...floristry? Starting a business from home or, if she can find a gap in the market, start an online business which would cost under £5k. Cooking to order? Think of your strengths and capitalise on them. No-one can get your mojo back except yourself and you need to be excited about new beginnings.
Good luck to all those starting afresh.