I am so sorry that you are feeling very down right now. Being a solo parent isn't easy and if you are in a repetitive type of position, that can eventually get very boring w/o mind stimulation. What would you consider to be an ideal job for you? What type of "mind" stimulation would be a good fit for you? Maybe it's time to think about doing something totally different.
I also think your recent injury has brought on a bit of depression because you can't go out and do the things you were doing. You feel stuck. It's time to think outside the box and find something that you can do that doesn't involve being "physically" challenged until you are healed. I am not familiar with the area that you live in, but there has to be some activities, such as wine and painting classes and yes, you can even take your daughter w/you and she can paint too. I have found this type of activity to be fun and you can meet some really nice people. Have you considered looking up meetings for parents w/o partners? They do some really cool things and it's another good way to meet people. I'm throwing out things that may give you something to think about.
Ginger, we are here for you. There is no shame in airing your complaints. Your complaints are valid and hopefully we can help you figure out some new things to do while you recover from your injury. Give yourself time to heal. I know you are very frustrated right now...but your body is telling you it needs some down time.
Please take care of yourself.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.