Shannon, thanks for searching for other posts like this one. You'll find this is a very common question...there are lots of posts in here that will help you find the way that works for you.
You don't have to stay on P1 for 2 weeks if you don't have to, but considering your loss, it sounds like you have been eating a lot of bad carbs and it might not hurt to have that extra week to get you on the right track.
When you go to P2, add one thing from the list of "foods to enjoy" that is a starch (brown rice, WW bread, WW pasta, oatmeal [NOT instant], etc.) OR a fruit. Add the same one thing (for instance, ONE serving of old-fashioned oatmeal) each day for a week. If you are still losing and don't notice any cravings, add an additional item. If you stop losing or you feel cravings, think about when you could eat that item (eating starches or fruits before lunch gives me cravings), or switch to something different. Some people can't eat much fruit, some can't eat many starches. Find out what works for you. You may stall during this time of figuring things out, but that's okay. It WILL come back off, and quickly.
I gained about 5-7 pounds while figuring out my P2, but I lost those pounds and almost 100 more than that since. It does work!