A question of coaching

I am not sure what is happening at the moment. I became a full-time self-employed coach five years ago. Since then I have built up a thriving coaching practice. However, recently I have been finding it hard to stay motivated. Admittedly, I have had various personal issues as well as lots of work and I probably have been working more than I should do. I used to love my coaching work but recently lam almost grateful when someone cancels. I cant work out what's wrong with me.