How long have you had them? What? No pics yet? The first thing a newbie notices is the teats get longer and fatter. They go into heat about ever 18-21 days. So, watch for the heat...lots of tail wagging and bleating.
If she is more then 3 mos along, we can sometimes tell from pictures. We need a pic from behind the goat with the tail naturally held up, pretty close, but showing the udder area. And, I like one from above, looking down on her mid section. When you take the shot from behind, if you think, "wow, my neighbors are going to talk", then yes, that is the right shot. lol.