Did you ask him to stay at home this weekend and help you or not?
If not, it may either be thoughtlessness on his part, or an assumption that if you needed his help, you would have asked for it, rather than his not caring.
With a broken leg, and being in pain, it is all too easy (and really rather natural) for you to be hurt by your husband taking no notice, but please don't make yourself miserable.
When he comes home, ask if he had a nice day, then say,
"I rather wished I had asked you to stay at home today, I found out I just can't cope on my own right now."
And stop going upstairs to the toilet just to wee! Use a bucket! and ask DH to go to the nearest chemist that stocks them and buy you a She-wee or order one online right now. It will make your life a little more bearable , that I do know.
I hope you feel better soon.
Oh, and if he is going to the chemist, ask him to bring you more painkillers too, or if neither of you have a problem with drink, a bottle of cognac to be taken sparingly by you.