Brown discharge in ivf pregnancy

Its Sweety

My embryo was transferred on 25 may since 1st june i am having light spotting my pregnancy test is positive i went to emergency on 9 june doctor saw sac and embryo but fetal pole was not there doctor told that it might be visible after some days but i am having continuous light brown discharge can anyone else share their experience is it normal in ivf pregnancy my next scan is on 22 june