Miscarriage and fertility

We recently had a miscarriage at 5 weeks. I am still spitting some, but we are ready to try again immediately. I have a beautiful 9 month old son and I miscarried before him as well. We did not wait for my period to return, and got pregnant immediately. Has this happened to anyone else? I so want another baby. I am getting older, and I want John Penn to be close in age to a brother or sister.