Hello, I hear your frustration! I would like to refer you to the website below. It is about Eat Right For Your Blood Type and it may just be what you need. I was not losing as fast as I wanted and thought "maybe it's the bread" and then I remembered this book which I read many years ago. I looked up my blood type and sure enough wheat not good for weight loss for my blood type. I would switch to the foods listed for your blood type. Some foods are highly beneficial, and act like medicines in your body, some are neutral and act like food, and some are toxic and should be avoided.
I also realized that eating the wrong food for my blood type was also causing bloating and chronic constipation. I switched over the past week and have noticed a big improvement in bloating and a return to regularity. Try it. It just might be the ticket for you.
The info is FREE.
The other thing i would ask is "are you exercising?" If you are older and female most likely you will have to do some exercise to get the weight off. Aerobic is a good place to start -- even just walking at your heart rate 3x a week will make a difference or doing the treadmill. It doesn't have to be gutt busting to be effective -- just make sure you are at your target heart rate for 20 minutes.
Hope this helps,
Keep at it,