On 5 march I have my period and on 11 march night my bf rub his penis on my vagina and sperm came after that on 16 march I get infection and I use v wash and some home remedies and one cream and on 20th march in morning my discharge came in black color quantity is one spoon or less and after that it come in brown color mix with white discharge like a drop for many time and on 22 its become normal discharge and on 12 march I take unwanted 72 is there any chance of pregnancy.