Pregnant??????

Brianna
My last period was Nov 17-20th 
I took my last birth control pill the 21st of Nov my boyfriend finished in me on the 22nd. 
I have not gotten my period or any spotting all month and my nipples are hurting and changing. 
I took 1 home pregnancy test and went to planned parenthood for a urine test they both came back negative. 
Is it a chance I am pregnant and need a blood test ???