Not likely.

Probably not
Your body is probably just adjusting to the BC and soon enough you will be back on track.

Highly unlikely. But if unsure of your hpt go get a blood test done to ease your mind

i had sex last on june imissed my period and i had sex on june 15th and he had injacculated his sperm in side of me and i ihad no symptoms till the second week of june then istared feelsick and all ihave been doing is feeling sick im tierd sick but cant trow up it comes up and goes back down and it s werd i took three pregnacy test at home and they all came back positive but i went to the doctor and it came back negitive what should i do im 19 teen but i wont tell nothin to no body ineed answers asap
help................. nichole

Go back to the doctor's office. You need medical care.

You took 3 tests at home and they were positive? Then the doctor's test was negative??
Consider going back for another test.
Your period is still late?
Are you experiencing any other symptoms besides the fatigue and nausea??