Something else to consider is that if she's 7 months old now, she was a fairly late hatchling (May as opposed to March or April.). So if she's a breed that starts laying later, say at 7 - 8 months, (egg laying breeds tend to start earlier, at 5-6 months), and that coincides with shorter days, colder weather and when egg production usually slows down, she may not start laying well and consistently till spring.
I also second the recommendation for the BYC site. Great site, great info, great people.
Third, I love my hens. Both as useful livestock and delightful pets. Can't say enough good about them, don't ever want to be without a couple hens ever again.
So feed Waddles up and keep her happy and I'm sure you'll get eggs eventually.