In feb 27th we were close enough to each other. I was in my leggis and underwear. He had nothing. My two layers cloths were on and we didn't had intercourse but I am not sure if he ejaculated or not. My periods are irregular. In march it was 14 days late I consulted a doctor and after taking medicine my periods came. In april it was 10 days late again I took medicine and it came. In may also its late, Now I am feeling a little tired my head is spinning and vomiting feeling some times. Is there any chance of pregnancy? Why this is happening?