Implantation??

hi girls. i had my period at the start of the week which only lasted 2 days and was sooo light...which is very odd as im normally 5 days. anyway at the end of the week i had some very pale pink discharge. we BD the dew days before period was due. when does implantation happen? im new to all this TTC... been very sicky and more tired than usual. would that have been implantation or?? we both have fertility issues. help 😟😐