If you’re finding too many gaps in your diary, how about changing your hours to suit YOU (until everything goes back to normal).
There will always be clients that can only do a certain time of the day, or certain days of the week, and you don’t want to lose them. So, the trick is to condense all of the evening only clients to the same evening/s. The morning only clients to same morning/s and so on.
This will free up the rest of your day to do something that you enjoy, stuff at home, making a plan to change your business, to do a part time job if money is tight, or to do sod all! Explain why to your clients and I’m sure they’ll understand.