Got intercourse- on 23rd September only once Periods like bleeding- 7th October 3days 5pads used 2nd periods like bleeding 15th November same 3days and 5 pads used. Even on 1st December I tested urine test which came negative and also don't have any pregnancy symptoms. But feeling stomach pain but this may be due to my Constipation issues from earlier. My periods are delayed and cycle is 40 days. Now i saw a line from belly buttom to pubic area slight faint line and little big stomach is that anything pregnancy or linea nigra can occur with another reasons??