Possible PG??

Im on cycle day 16 and have been having discharge for a 5 days now and it started out egg like and clear alot of it. Over the period of days its turned a milky color and yesterday it had some pink to it ? It is accompanied with cramping in my left pelvic side. I never had discharge like this or this much before. Possible PG? my period isnt due until the 15th , when should I test?