Suggest Remedy For Delayed Periods And White Watery Discharge

Hi. I 18 days delayed now and I have white watery discharge, sometimes it is stretchy but no foul smell. I noticed my breast is swollen for 2 days now. have used pregnancy test twice and all comes negative. I have sex one tim last May 31 and since then no period yet. MY partner don't come inside me, we use widthrawal. Please help. Thank you so much