help please

So I had unprotected sex about 3 weeks ago. I started Junel fe a few days later. 
I went to the er for nausea and headaches, they asked could I be pregnant and I said not that I know of. 
They ran tests and said everything was normal , do they automatically do pregnancy tests when taking urine and blood? 
According to eve my period was due yesterday but according to glow it is due in 4days. I usually get sore breasts and slight cramps but now I just feel sick to my stomach, not to mention I have a cold. All I do is work, sleep and eat