Hi, Linda. Sorry you are having a tough time with motivation right now - I do understand the feeling!
Maybe if you incorporated some other form of exercise that you really love, or even something brand new, into your routine that might help??? Maybe you just need to shake things up a bit. I don't know how helpful that is, but that's the only suggestion I have.
Knowing your drive and determination, I am sure that this is just a temporary slump - you'll be back out there pulling those incredible times on your runs in no time!
Hope you have a good day!
Susan