redrhumba - I'm WTTTC until after Christmas, if it helps your sanity, think of it this way, if you wait until after Christmas, you'll get a September/October baby, so they will be the oldest in their year, rather than risk an August baby, apparently it takes August babies until the age of 7 to catch up being nearly a year younger than classmates at school. Therefore, Christmas is a sensible time to start TTC.
Also, you get to be be in that first few months of post baby flabby belly in Autumn/Winter, when thick jumpers can cover a multitude of sins, wereas if you got pregnant now, you'd be due in July, meaning you'd be feeling huge over summer where the clothing is the most unforgiving! Throw into this, you don't want to spend Christmas sober and not being able to eat all that yummy blue cheese and such like you have over the season.
Really, January is a good time to start TTC!
Now, tell your DH you've agreed with him, January is a great time - so you're going to start taking the folic acid now, getting your body in shape for January etc. Treat it as agreed and all sorted.