So lady's I need to see advice went to the hospital on the 19th for.pain thinking I had cysts…

So lady's I need to see advice went to the hospital on the 19th for.pain thinking I had cysts checked me I was fine test was negitive for pregnancy than on the 20th yesterday I started to spot pink with clear discharge I go to bed thinking maybe I'm about to start my period I wake up with mild period like cramps and it was brown with clear discharge only when i wipe could this be implanation if so how long should I wait to test?