there does not seem to be any reason to get worried about. the amount of bleeding that one goes through during a menstrual cycle is a very subjective thing and the important criterion is to have regular menstruation
as far as the issue of concieving is concerned
that the bleeding is less than what you generally encounter is no reason to worry about the potential to concieve.
at the end i would also like to add that there are certain medications that can be offered to you after priminary examination which may help increase the menstrual flow.