2 years back I was detected with pcos and doctors prescribed krimson 35 (21 day oral contraceptive pills, along with glycomet and folvite, since then I am taking the pill continuously without missing a dose same time everyday. I start my pill pack on sunday (5th day of my period) and it ends on saturday. I generally get my menses on wednesday night or thursday morning. My lmp was on 12th june (wednesday), it is of 6 days. I started my pill on 16th june (sunday, 5th day of lmp). I had protected intercourse on 19th june (wednesday, 8th day from lmp) with my husband using condoms and the condom did not break also. Yesterday (1st july) and today (2nd july) I experience brown vaginal discharge with few drops of blood in the morning. My pill pack will end on 6th july and my scheduled period will be on 10th july. I have no plans to conceive now, and we used protection (pills+condoms). I have not missed a single pill and m taking it consistently. Is that discharge a sign of implantation bleeding? I am not drinking water and facing a lot of stress recently and this doesn't happened to me in the past 2 years. Should I worry about pregnancy after all the protection? Right now my weight is 65 kgs and height is 5-5. I have also taken stemetil for motion sickness during last cycle pill free week before my period since I was travelling. I had not taken any other medication. Is it breakthrough bleeding or implantation bleeding since this bleeding happens 20 days after my lmp and I had protected sex on day 8 from my lmp. Should I be worried about pregnancy at all?