forget about things running smoothly

I am a poor negotiator. Perhaps I'm too laid back when it comes to money and business-like decisions. The moving guy rescheduled the move for Sunday instead of today because another job seemed larger than he realized and was going to take multiple days. I said okay, Sunday was fine but it was the last day I could move. M is upset about the entire situation and at this point I just want it be over. I'm way too stressed at this point to even consider that he won't show up on Sunday. I'm getting worried. I just want things to work. I don't expect things to run smoothly; I just want them to work. Why does that seem like too much to ask?