Ok, take a deep breath, slowly......in, out. Relax.
First,

's are in order. You sound like a very organized person for getting all your affairs in order prior to surgery. That is a task that not everyone can accomplish. Just know that we are all here for you and you can come here with anything.
Well, the way I see it, I think you know your answer already, you're just frightened. I'm sure that your family knows your desire to not be alone and they will do their very best to make sure that is carried out. However, because of the scheduling conflicts that you were talking about, it does sound like you might have to spend some time alone. You will be able to handle this. I think when you said "I told them well I will just have to deal with it", you know that is what you are going to have to do. You can do it.
Are you expecting visitors in the hospital??? Other family and friends??? This might help to fill the gap when your husband or mother can't be there.
I would say that if your desire is to have your husband and mother there as much as possible, then go for it. But, just remember that you are recovering and you will want to sleep a lot of the time you are in the hospital. This is great for you, but makes it very boring for those there with you. They will be there for the majority of the time it sounds, so just have faith in the nurses and let them do their job, and take the opportunity of time alone to get in a good nap, or watch a show you don't usually get to watch, or something like that.
I was glad to not have anyone there at times. When people were there, I felt I had to entertain....not that I was going to have a party....but just felt I needed to be awake, alert, smiling, hair combed, etc. Then there were times I felt lonely and wished my husband was there with me at 3 a.m. Then it would come time for Percoset and back to sleep I went.
I'll be thinking of you, and I know that you will be able to get through it. Just keep in mind how much better you will feel when it's all over.
Take care,
Erica