I was in hospital on my own two weeks ago and, while I wouldn't exactly recommend it, it was not too bad at all. DH stayed at home to look after 4 year old DS.
I had planned a home birth (mostly to get around the childcare issue) but was diagnosed with an infection which meant I had to have intravenous antibiotics during labour. DS has medical needs which make it difficult for us to leave him with people who don't know him extremely well and, in any case, I felt it would be less disruptive for him to have DH staying at home with him.
I arrived at hospital by taxi at one o'clock in the morning, and the maternity department was very, very busy. For an awful couple of hours, I was left completely on my own, with just a buzzer to call the midwives if I needed them. That was the hardest part, and I found it rather frightening. I didn't know whether or not to press the buzzer... The midwives obviously felt that I still had some hours to go, and was okay to be left, but I suspected that things were speeding up quite quickly. If you have somebody who can support you through this stage, it would be better than having to be thinking about your own care and making decisions when you are in labour.
If you do go on your own, don't be afraid to ask for help from the midwives. When I finally reached the delivery ward, I gave birth within 40 minutes - so should have called them sooner! I felt totally safe and able to cope as soon as I was with a midwife - and the midwife was amazing! so reassuring and competent and matter-of-fact. At that point, it didn't matter a bit that I had no birth partner, because I had total trust in the midwife and she was all I needed.
Various of my friends said they would come to the hospital with me, but I didn't feel I could call them at one o'clock in the morning. They have since all said that this was very silly of me, and of course they would have come
If you have anybody at all who has offered to help you out, do take them up on it.
Like I say, I really wouldn't recommend being completely on your own - but it is manageable, particularly if you really have no other option. My baby is gorgeous, healthy and now two weeks old. I would do it all again this way if I had to.