I have a 28 day menstruation cycle period. Normally I experience cramping 8-10 days prior to my periods due date and experience spotting 2-3 days before the actual bleeding happens.We are planning for a pregnancy since the last month. This month I haven't experienced any cramping 8-10 days before my period due date and also am not spotting though my period due date is on 4th of this month.Since the past 3-4 days am experiencing slight cramps but not much as it used to be before..Could these be any signs of pregnancy or implantation...When should I go for a pregnancy test??? Kindly advise...