Sad miscarried

I found out in September that I was pregnant with my 2nd baby but earlier this week i miscarried the baby. Am so sad. My whole family is sad. I think that my son is taking it the hardest because he wants to be a big brother so bad. Please just pray for all of us. The saddest part of all of this is I don't even have an ultrasound picture of what my baby should have been. All I have the positive test and thats it. The doctor didn't give me an ultrasound because my HCG numbers were really low. Is there someway that I can remember my baby without the proof that I was pregnant besides all of the crying and heartache that I have.