I had my son (now 21) with no problems or issues at all.
on my 2nd pregnancy, I had a missed miscarriage in 1996 at 14 weeks (found out on my dating scan 2 days before) and had to go in to be induced into labour to deliver the foetus. (later found to be a baby girl)
The doctor told me that she wasnt one to believe in waiting a set amount of time to try again, just for us to try when we were mentally and emotionally ready ready. We started trying more or less straight away. it took 3 months for me to get pregnant and one year and 2 days later I gave birth to my daughter (now 18 years old)
I have also got a 15 year old, a 12 year old and a 5 year old....all 5 of my kids are strapping, healthy and fit.
Currently trying for dc#6 to complete our family.....took me 2 years to catch, and sadly had a miscarriage in may, at 9 weeks. Started trying again straight away, but have not had a period till last week (7 weeks after the Mc) am just starting mt TWW today.
so...go for it when you feel ready.....just because its happened once, doesnt mean it will happen again. yes you will always have those nerves every time...it doesnt go away.....every time i got to my dating scan, i would worry, so whatever week you made it to, you will always worry when you get to it....the trick is to put your worries into perspective and dont allow your brain to get carried away with what ifs.....all that stress is not good for you, for conception or for a new forming baby!
good luck to you in your quest TTC xxx