Ask your Dr's opinion.
I was told to wait one full cycle , and was told to give the tubes at least two weeks for the swelling to go down. (although many women try right away)
For me, i was in so much pain for the first two weeks following my surgery, there was no WAY I would even consider ttc, LOL... Some women have a much easier time and feel great right away, but for me, the first week was just a blur of pain. I have no idea why. I sailed through all my c-sections, but wow, my abdomen felt like it had been run over by a truck.
I thought " heck, we waited this long, why not wait til one full cycle." Then I knew all the pain meds were out of my system etc. I was so scared that my inscision would hurt when i got preggo, and in truth, the tenderness never really went away. But of course, they dont at ALL touch your uterus, so its quite safe to be preggers right away