Planning a wedding and ttc

Me and my fiance just got engaged in June and we have been ttc since January. I am having a hard time picking a wedding date because I do not want to be big at my wedding (I want to still feel sexy at my wedding. not that pregnant women aren't sexy or anything) I want to get married soon but I also don't want to stop trying for a baby. Any one have advise or ever been in a similar position. I'm also getting discouraged about if I can even get pregnant. Ugh. Just a lot going on I guess!