i have a regular 30 day ovulation cycle. i took nordette as an ECPon oct 3 and experienced slight bleeding on the 8th. Had a sexual encounter on the 10th which corresponds on the date of my ovulation period according to the calendar app im using and sexual encounter happened again on the 22nd. I experienced a slight bleeding for an hour today which i think i mistook for my next menstruation which should have had happened on 27. Does the bleeding that i experienced could be the so called implantation bleeding?