as much as i would like to address your question there can be dozens of reasons why your period was shorter this time. it would really be impossible to offer you a specific reason without knowing your complete medical history and of course being able to examine you and run a few diagnostic tests. i suggest that you make an appointment with your women's health care specialist for a consultation so that you can be properly assessed.
why my period last only 3 days. i have the same problem but i am 39 never had a baby and did not have my tube tie. still wanting to start a family i had a blocked tube on one side and had an operation to increase the chance to get pregnant about 3 years ago but it was never successful and i am not sure if that has something to do with it or just because i am getting older?