week 36 day 3 (bleeding) 1st time mom..

Last tuesday muntik na ko maadmit dahil dinugo ako at nagpanic then inultrasound and IE ako ng OB ko.. baka daw kasi my chance na placenta previa. But results come out and okay si baby..tumaas na daw siya , nakaposition na din at closed pa ang cervix ko .. ngaun as a first time mom., Is this really normal? Ung magbleed ng bright red then after how many minutes mawawala din then brown discharge na siya? Im really worried po..