Don't do the whole 'wait 6 months thing'. I went back to my fs when DS 1 was still fully bf and I had no cycle. He said that his preference would be to stop bf before starting to try again.
I partially weaned DS. Well, I kind of just went to a pretty strict 'by the clock' feeds instead of more demand feeds, and sure enough my cycle came back. And it was always regular before hand (you could set a clock to it) and it was regular afterwards too. I kept feeding DS, comfortable in the fact that it was now up to us to decide when to start again.
I then slowly weaned DS. (It was harder and more emotive than I thought, but I did what I thought was best for our family as a whole). I gave him his last feed the morning before I went into the clinic for the next journey to start! I had read some data that suggested breastfeeding might inhibit the implantation of an embryo. It was not a risk I was willing to take - I would always have wondered. Now I'm not so sure, I doubt bf would have made a difference, but I'm ok with it all.

Gee, all over the place.

Get down to your FS and start the discussion!