Well done Cheshire stick at it. I lost five and a half stone through running and eating sensibly. I've always struggled with my weight and I could (should) lose a couple more stone. Build up slowly and enjoy seeing your progress. Take delight in the small, daily achievements as well as looking forward to your 10K goal.
Wescat, hope you do start to feel better soon. I had post viral fatigue earlier this year and I was unable to exercise for about 4 months. Walking across the road to buy a pint of milk at the corner shop wiped me out for the day. But it did get better. Slowly. It was about 6 months before I could run and even now I'm only on about half the weekly mileage I was doing good this time last year. Hang on in there - it will get better but please be kind to yourself and be patient with yourself