correct weeks and months

Brittany
If I am 28 weeks am I 7 months? Or how do you guys do it?
24-6 months 
28 weeks - 7 months 
32 weeks- 8 months 
36- 9 months 
40 weeks-10 months?
I don't want to sound off when I tell people I'm 7 months at 28 weeks when I'm really 6 months