Myself I found out wen I was only about 3 to 4 weeks pregnant. My friend was 17 ad knew in her heart she was pregnant went to a doctor got a test done it was negative. She waited then went to another doctor and found out she was 4 1/2 months pregnant and my sister for her third child didnt find out untill she was 6 months. Don't ask me how but it happend but those are the times they found out. And they both have had really healthy babues so its nothing to worry about.