There is a rather simple way of testing this. Look at the hair in your comb when detangling. Does the hair strand have a white bulb at one of the ends? If the answer is yes then your hair is most likely shedding.
Unlike breakage, hair shedding can not be corrected temporarily, it is going to happen whether you like it or not.
Breakage can be a result of many things. You will have to analyze your hair and figure out what the root of the problem is so you can treat it appropriately.