stacie, it's a mystery right now, but it's one you can solve. Rockinrobin is right on in what she says--she knows.
I'm wondering how you came to be eating pizza at lunch, and also how you came to be eating steak etc. for dinner. It sounds like you must have gone out, right? So, you made a conscious decision to go off your plan and eat out, and also to eat exactly what you felt like eating.
It sounds to me like a part of you is not going along with the weight loss plan! "Heck with it," she says, "I want steak and beer and that's that." And then she hijacks you. Are you gonna let her do that?
You have to really want to lose weight to make this work. That means getting everyone in your head on board with it, including whatever rebellious or frightened part of you wants to head for the nearest restaurant. For this, you might benefit from counseling. Some therapists specialize in food issues! You can likely get a referral from your doctor, or perhaps find someone on your own. A consultation with nutritionist or dietitian might also be helpful.
As for Jenny Craig--I get tired of the "frozen food bashers"--there are definite benefits to the prepackaged meals route. My plan is the "poor chick's Jenny Craig" namely Lean Cuisines most of the time, with added vegetables, for lunch and dinner. These meals are not bad--I like them. I am not into cooking, and this way I know exactly what I'm getting, with a good balance of nutrients and a variety of choices. But--I digress. The point is, no plan is going to work for you if you bolt for the door when the going gets tough.
You CAN lose weight, and you can keep it off as well. It isn't an easy task--you will have to work hard--but you CAN do it.
You might want to visit the Chicks in Control forum to see if any threads there are helpful.
Good luck!
Jay