Did I really predict his birth time?

So my boyfriends sister had her baby the other day. I was there for the delivery and all and was there throughout her labor which she had stayed overnight. My boyfriend and I and their sister and mother was there and we stayed up there all night with no sleep. At about midnight or 1 I was thinking about when I thought she was about to have her baby and I thought "7 AM.... 7:47" very random and I just didn't think much of it just whatever. And later about 5 I remembered again, 7:47. And iv had weird predictions before so I started to believe it. And when it came to about 7 am I started to watch the clock constantly because she was already starting to push. And I saw that clock hit 7:47 and I heard in the other room while I was sitting out, "Congratulations!" From the nurses. My heart pounded. I had predicted her baby boys birth time... The exact time. And the only thing I regret is not telling anyone beforehand so they wouldv believed me. How is that possible???