off birth control after 7 months, 1 day late

I was on bc for 7 months as a horomone treatment for PCOS. Hubby and I decided we wanted to TTC, so I stopped. The first day of my last period was December 13. I have been exactly 28 day cycles while on bc. This is my first cycle off the pill. I should have started January 10. I know I am only one day late, but I have had very sore breasts and nipples for at least 2 weeks. Since it is my first cycle off bc I am not sure if I am even late or not or just adjusting to being off of the bc. I ususally have symptoms of cramps headaches and sore breasts 4 days before I start my period. I have not had none of that only the very sore breasts and nipples for 2 weeks. Also, the last two cycles on bc (november and december) were very light periods, mostly spotting to light flow. any comments? thank you.