Everyone is different hun, there is no "actual" time you start showing, I was 12 weeks with my first when I had a little bump, now with my second I'm 16 weeks and I am huge, I look about 7 months lol, x
There is actually a trick to that if you can try it. Grab a measure tape, start it at the very upper tip of your pubic line, going straight up once you see the 4 inches that is where the belly should be sticking out to. You r almost four months pregnant and you can do that for every month your pregnant. Its also a good way to see if your pregnancy is where it should be. Also go to any pregnancy website and go to the picture gallery of real pregnant people at any week you choose! Good luck
If this is your first baby, most women don't actually "show" until 20 weeks. At this point, you will probably notice a change in your body. Your breasts will swell, and you pants will probably feel tight across your abdomen. By around 18-23 weeks is when you really pop out and look pregnant