maybe baby??! help!

Nickey
Last cycle started 09/28 and about 5-6 days ago I started spotting a very mild light light pink (mainly when I wipe).  That stopped after a couple days but I've had a mild headache every single day since (I never get headaches). Also, yesterday started feeling some mild cramping, as well as lower back pain.  All very mild.  My boobs have been a little more sore than usual as well.  I BD'd on my possible ovulation day (going by my spotting) so who knows.  I took a hpt yesterday and it was neg. does it sound like AF is coming or possible pregnancy