NoLeafClover - Thank you for sharing your feelings and your questions, and for your patience while we work to formulate your answer.
What I would sincerely like to suggest is that you start writing down and measuring absolutely everything you eat as well as the time you are eating. If you know the calories, include them .. if not, then we can help you calculate them. MedHelp has a new FOOD JOURNAL that will be released very very soon .. I highly urge you to use it. Then, with that information, we can provide you with some feedback and perhaps some small changes you can implement that will help you begin to lose again.
Please consider trying to keep your calorie intake in a closer range day to day. For instance, you mentioned 1,000 calories and 1,700 calories. A 700 calorie swing is too much and confuses your body. Your body may think you are starving on the 1,000 calorie day and go into self preservation mode where it works to hold onto every calorie it can. It does this by making you feel tired to conserve energy, calling for hunger to encourage more food intake .. and slowing your metabolism to again conserve energy. Your body does this as a protective mechanism to keep you from starving.
I did not have your height, but used 5'6" in the following calculation. So .. based on 5'6", male, 23, 237 lbs and an active lifestyle (30 min activity day), it takes approximately 2,700 calories to MAINTAIN your weight. Since it takes a calorie deficit of 3,500 calories to lose 1 lb, if you shave off 500-750 calories from the calories needed to maintain your weight, you should lose approximately 1 to 1/2 lbs a week by lowering your calories to 1,950 to 2,200. As yo can see, this is considerable higher than what you are eating. Even if you went to 1,700 calories a day, I would highly urge you to not go any lower. It seems funny, but sometimes we have to eat MORE to LOSE MORE and get out of "starvation mode".
Here's a journal entry on "How to Survive A Plateau" that will explain in a little more detail and give you some concrete ideas regarding eating and exercising, what constitutes a plateau and why .. and how to get beyond them.
http://www.medhelp.org/user_journals/show/40803
Now .. as far as eating and feeling "full" .. there are soooo many foods that can help you with this. I believe we all face this from time to time and there is no reason to be hungry while trying to lose weight.
Here are some "filler" foods .. that I hope you might consider.
Watermelon - Each cup contains approximately 46 calories .. go ahead and eat 4 cups!
Campbell's Select soups - Try those with 110-130 calories. The entire can is two servings so eat it! Then, combine it with a HUGE salad of greens .. an entire dinner plate .. and add only 2 TBSP of Paul Neuman's low calorie dressing (choose your favorite that has 40-80 calories a TBSP). Try putting it all in a large bowl or cup with a lid and shaking it a LOT before putting it on your plate. It coats every leaf and you never fill shorted on the dressing. You can add a TBSP of parmesan cheese for a little kick!
Oatmeal - Eat a couple of servings if you need to .. at about 150 calories each. Add a scoop of protein for even more "staying" power!
Eggs and toast .. Each egg is only 70 calories and a good whole grain toast is 70-80 calories. 3 eggs and 2 pieces of toast is 350 calories or you can add another egg to make it 420.
Try to remember to eat protein when you're feeling hungry as it takes longer to process and keeps you feeling fuller longer. For the carbs, try to keep them whole grains as it also takes longer to metabolize..
Two more things, and then I'll be quiet. Sorry for the length of this .. it just takes a lot of words to share my thoughts.
As for the exercise, it appears you are doing the same type from day to day. Try mixing it up! Our bodies adapt very quickly to a routine. Change your exercise up from one day to the next in a random pattern. Walk, bike, pilates, swim, walk, aerobics, weights, pilates, bike, walk .. Then, try new things .. jump rope, basketball, hoola hoop, dancing, boxing, rowing, tennis .. open your mind to many possibilities.
When we stay with the same thing day to day, our body gets more and more efficient and burns less and less energy in performing the same task. When we keep things mixed up, our body never knows what to expect. It is commonly referred to as muscle confusion and it keeps our bodies burning calories at maximum efficiency. Don't forget to fill in your exercise tracker .. it gives us a good history of what we're doing and allows for feedback in times when we simply get stuck or are going the wrong direction.
Finally, stay really, really involved in the community here .. and try to do so on a regular basis. This helps with motivation and the information, friendship and encouragement shared here can be crucial to our success.
Do hope to hear from you and sending you many (((Hugs))). YOU CAN DO THIS .. WE ALL BELIEVE IN YOU!!!