She was a little subdued last night - I am not sure if she was a little sore or something? She also battled to wee. Had a tiny drop of wee and that was it. I phoned the vet, and he told me how to help her. When I went down to do this, I think that she had already gone. The litter box was wet. So, I will just keep an eye on her now. She has her next session on Friday and then another 2 next week.
Thanks for all your prayers and wishes!