Hello Doctor. My periods are irregular. My last periods started on 26 January, then 22 March, and then on 18 May (ended on 24 May). I had unprotected sex on 12 April, but as far as I know there was no ejaculation inside. I took a urine
pregnancy test on 24 May and it was negative. I would like to know if pregnancy is still possible and what could be causing my irregular periods.