Very light spotting?

I have been ttc for about 4 months now. AF is 6 days late. I have POAS everyday besides today since tuesday. all BFN I have had a few symptoms so I really thought that this was it. I have sore bbs, hungry all the time, lower backaches, tugging feeling in my lower stomach, light headaches for a week, lower back pain everything!!! Well I always start in the morning ALWAYS and its 3pm and I just went to the restroom I had verylight pink mixed in w/ alot of CM...could it be early pregnancy spotting?