so i had my period September 27 and then about 2 weeks approximately 6 days after intercourse i started spotting for about 3 days and on the 4th day the bleeding increased some more, but then got light again in the evening. The following day i had heavy bleeding and then it got light in the evening and it was the same the next day and then on the 7th day it got very light and is practically finished. I would like to know if that was implantation bleeding or was it just an irregular period as i was on birth control but i stopped in July.