I can't stop crying when I see babies

Megan • 24, have a 6 year old girl and an amazing boyfriend! Expecting #2 November of 2015!!
I'm going to guess it's my hormones but my bestfriend just had her baby and when I got there and saw him I held back tear, especially when he cried, even watching a show with a baby in it tonight I'm tearing up..I'm 7 weeks, and nervous I'll have another misscarige..but I don't want to keep crying at babies! I'm hoping I'll have #2 November 20th