###Human: Followed by PMS, my period lasted for only two days. Is it worrisome? ###Assistant: Hello. Firstly, a single episode of early menstruation with normal flow does not qualify for being labeled as a case of polymenorrhea. Secondly, as you have been protected during intercourse, an implantation lasting for two complete days is also unlikely. So, you are pregnancy safe. Thirdly, the early withdrawal is likely to be stress induced hormonal imbalance especially progesterone level during this cycle which caused PMS (premenstrual syndrome) and menstrual cramps in this cycle. So, there is no actual need to be worried. Just maintain a menstrual calendar for next three months to understand the pattern of bleed. If the pattern continues then a hormonal profile and an ultrasound pelvis shall be required. But as of now, no intervention or investigation advised. Just increase your water intake and if not then try yoga and meditation which are great stress busters.