It's fine...It can be difficult when they're skittish and don't want to stress her more than necessary. When she starts getting close you'll see major swelling under her tail and when she walks she'll look like her back end has come unhinged..Lol (best way I know to explain it). She will start with a white to cream discharge. When you see an Amber discharge or an Amber bubble, it's time. Amber discharge, you have a bit of time usually to get her where you want her. Bubble means she's pushing!
Does that help or terrify?