Your symptoms suggest that you are perhaps suffering from a post-abortal hormonal
disturbance. Though, pregnancy
should be excluded as you had unprotected intercourse
. Urinary infections also can lead to menstrual disturbances. You should see your gynecologist for a proper appraisal of the situation, correction of hormonal imbalances and further management. Weight disturbances, if any, should also be corrected. Good luck.