Hi. I Am Currently 2 Weeks Late. I Have Normal

Hi. I am currently 2 weeks late. I have normal 28 day cycles and am never late. I do not take BC due to illness I have. All home pregnancy tests are still negative, but i am having symptoms i do not usually have with impending period (nausea, dizziness, tender swollen breasts, constant fatigue even after a full night's sleep.) I have been charting my ovulation & periods for a year. I had some very very light discharge for a day that was very dark a week after i ovulated and i only noticed it once-not even a full day. Assumed it was implantation bleeding. But now im unsure. Should i wait and see if i miss another period before seeing a doctor? Could i actually be pregnant even though home tests dont confirm? I am living as if i am pregnant to be safe until i find out for sure.