Most often, bread in dreams represents your finances. A lot of bread or a very big piece of bread would be connected to something that is financially profitable. If you are baking bread then it is connected to the way you are bringing in income. If you are out of bread or there is some problem with the bread then the dream is telling you that you may need to make changes in the way you handle your finances or bring in income.
Less often bread can be connected to your own personal basic needs in some area of your life. So ask yourself how well you feel your needs are being met in real life and compare that to the amount of bread and condition of the bread in the dream.