I got pregnant 9 months after my c/section and had no problems. No-one told me that we couldn't or shouldn't before any amount of time. I have heard that it takes 2 years for your body to completely recover fully from a c/section, but I think that is how long it can take until you have regained all your strength properly. Are you having a six week check-up? Maybe ask when you go there ...

FWIW, I don't think having a c/section affects when your period would return - it doesn't prolong it or anything like that (well it hasn't for me).