Are these things right. When I first found out I was pregnant I was told that I was 6 weeks. Then…

Are these things right. When I first found out I was pregnant I was told that I was 6 weeks. Then when I made the the appoiment for the 8th week I was told I was 6 weeks and 6 days. And now it's getting me really confused. I'm 22 weeks and 6 days and I've been trying to figure if I'm either 5 months or 6 months. I've been asked how far along I am o just tell them I'm 21 weeks and whatever day I was on. Please help