Any ideas weird cycle

So this last cycle has been weird for me. Been cramping for a week now. Don't even know if I would call it cramping it just feels like lower abdominal pressure.  Spotted very small amount on day AF was due to arrive. Then nothing for 2 days. Then light flow for 1 day then spotted for 1 day. Then nothing for 1 day then a very small amount of spotting again for 1 day. I have been off bc for 6 months so I would think my hormones wouldn't be fluctuating. Haven't ever had this happen before. Took test and BFN? I don't know what is going on any ideas are welcome. I am going to make an appt with my dr I am due for annual exam anyways.