Had sex on sep 17 and 18 both he finished inside. I ovulated on sep 24 and also had sex on the 26th which was a fertile day.  My period was supposed to start oct 8th, but I started spotting oct 4th. It was brown and red and at times there was nothing and other times it was a little heavier. Never filled a pad. But lasted about 5 days. Only had spotting after sex. But then oct 13 I had brown discharge and today I have the same brown and red bleeding or spotting not sure. What do you this could be?