Light spotting, sore nipples, late

Alicia
I have been ttc for about 8 months. I was suppose to start on the 6th, did not start missed for seven days and took test, it was negative. On the 12th started light spotting, I wear a light pad and never have need to change it. My nipples are extremely sore and most nights when I'm trying to go to sleep I'm very nauseous. Anyone else experience this?