So sorry to hear that you are going through this. Having your dreams snatched away in such cruel circumstances is hard. I hope that you are able to get some counselling soon, perhaps your GP can get you seen soon.
In the meantime, do feel free to vent here, although most women here are struggling to overcome fertility, I am sure that we can empathise on some level with your pain. I don't know if I will ever have another child, but I know I can keep trying at the moment if I chose to do so. I know that I would be very upset to have that choice of trying taken away from me in a permanent fashion.
All women eventually have to come to terms with the end of their fertility, but when it comes suddenly and unexpectedly it is harder somehow.
Are you coping with the physical side of the hysterectomy? Did they leave your ovaries? Is there any chance of you having a child with a surragate or would this not be an option for you? If you want to talk through any of the above, then we will be a sounding board for you, or if you just want to vent the emotional pain then here is a good place, as we are all using this board to do just that.
Whatever you do, be kind to yourself, you have been though alot and having a young baby is hard too.