had my period 07 October to 11 and drink clomit till 15,November ddint see my period ,07 December to 09 I see my periods,January didn't see my period but have sex a lot,02 February to 04 I saw my periods,have sex 14 Feb , but 20 and 21 after sex I drink morning after pills,01 March I saw pink spotting and 04 March tested negative with urine and sonar,14 March feel cramping,,,my Question is when did I conceive if im pregnant or am I still late as I have irregular periods