cblashes's TTC after m/c Wish

i'm 39 years old and over the last 4 months have had 2miscarriages. i'm getting a bit discouraged. i have a beautiful 15 month old son. we were VERY lucky with him and conceived quickly. however, the past 2 pregnancies have failed. i so desperately want to give my son a healthy happy sibling and i fear that my days are numbered. i'm so scared that my dream of being a mom of two won't come true. i don't want to give up, but i also don't know if i can handle another heartache,my son deserves this!