Missed Period with BFN

Lex
Hi ladies! I am officially a month late with no signs of AF coming but keep getting BFNs! Went to the doctor and they did a urine sample last week... Negative. Have been experiencing a lot of symptoms: breast swelling and tenderness, bloating, very light cramping, some pinching, extra salivation, lightheaded, and so sleepy! Has anyone been in the same boat? Did you get your BFP? Or did AF show the following month? 
​Thank you so much in advance for all if your responses!