Stopped birth control pill mid way pack roughly 3 weeks ago, i was supposed to get my periods on the 5th february but did not and had sex on the 9 february, still no period could i fall pregnant? experienced nausea and vaginal discharge

Maybe: One can do a home urine pregnancy test if worried. A urine pregnancy test, done correctly, gives a reliable result 3 weeks after sex (3 weeks after when conception might have occurred), or 1 week after missing a withdrawal period. If done sooner, a positive result is likely real, but a negative result may be due to testing too soon, and thus lead to a repeat test.