Having tablet for bleeding at 6th week.

Doctor suggested me to have tablets to follow for 2 weeks and have another ultrasound scan because of below issue so will it be successful pregnancy or i will have to hear bad news please advise. (Issue:Past i had PCOS so dosctor suggested me to take Yasmin tablet for 3 month so i took from October to jan and i got positive pregnancy test in Feb... As per LMP iam 8 week pregnant but as per scan report iam only 5-6 week pregnant as per doctor this issue because of irregular in period cycle... So now i had ultrasound heartbeat was not heard because still iam 5-6 week pregnant... And all of sudden iam passing small apple seed size tissue along with urine and very small line  spotting from 3 days back pain, abdomen pain from 1 day... So want to know is this will lead to miscarriage??? please advise)