Im so sorry for you loss. I also had a c-section with my daughter and my dr told me to wait til at least 6 months to try again because she wanted the age spaced at least a year for my body's sake. I ended up getting pregnant when my daughter was 4 1/2 months old, and everything was fine when we went in for the ultrasound, and it all turned out fine. Best of wishes to you.
I am sorry to hear about your loss. This is a question better answered by your ObGyn, depending on your general physical and emotional health. If you are not anemic, once you start to feel better physically and emotionally, I feel it would be OK to start trying again in 3-6 months.