The others have put it so well @sazbe. I understand your pain at not having your partner there and I don't know the reasons but do remember that being there is not always a sign of great love and care. It is important that you have someone with you though if you can - a friend can be that someone instead of a partner.
You're going through a very emotional time and, if like many of us, you're used to being the one who gets on with it, you may find yourself shocked by your fragility. Now is the time that you have to look after you.
Ask for more pain meds but also make sure that you're not becoming constipated. It can sometimes be something that the medical staff don't follow up.
Take care.