Am i pregnant? no period in 2 months but irregular i'm 19. took 2 hpt 5 months after intercourse both negative. no pregnant signs only missed period.

It is possible: While it is possible to become pregnant whenever you have intercourse (even if using contraception). That being said, the most seneitive hpt sold will still at the very earliest become positive in 3 days, more likely 5 days. However, given your age, there are myriad causes of irregular menses, from diet, to stress, exercise, change in activity level, emotional upheaval, or other health issues.