No Eggs for 2.5 Months!

Hi, I started keeping 2 buff Orpington's last February. They started laying in May and all was well until one of them became broody in July. Nothing would dissuade her so I let her raise 2 buff orpington chicks. When they were four weeks old, she abandoned them and became broody again. I live in a suburban community and could not deal with constantly broody chicken, so let her go live on a nearby farm. As soon as she left, her sister became broody and would not get off the nest for any reason. I ended up getting her a black sex link chick to raise on her own. Now, I have a year old buff orpington, the two pullets are 20 weeks old and the baby is 10 weeks old. All should be well, but my-year-old stopped laying in August when she went broody, she also started molting several weeks ago. I am wondering when I will ever start getting eggs again. The 20 week old pullets are not showing any signs of being ready to lay, their wattles and combs have not grown. Since I am only keeping chickens for eggs, this is becoming rather frustrating. Any suggestions?