I'm so sorry for your loss. Its such an awful thing to go through.
I also had an mmc, discovered at 14 weeks, baby died at 8. This was nearly 6 months ago, so I can tell you that you will feel better in time. Right now though you need to face and deal with your grief, you have lost something very precious to you and its common to have a mixed bag of emotions, including sadness, guilt,anger, fear and worry. Try to get support from as many places as possible. I found talking to people who had been in a similar situation in real life and on MN very helpful.
You can also call the miscarriage association, they offer a very good counselling service.
Above all dont try and "cope" with it, because this can turn so easily into burying your emotions and then it takes a lot longer to deal with. Having a bloody good cry is definitely allowed!
Please dont feel that you have lost your one chance at having a baby, in time when you are ready you can try again. Many many women go on to have healthy babies after miscarriage, and you will discover on MN that there is a lot of advice and support to help you with that when you are ready.
Like Norma said, look after yourself, lots of rest and treats. Dont underestimate the effect of the crashing hormones either, you need a bit of fussing over!
xxxx