Placenta Previa

Hi mamshies! I am 17 weeks pregnant and I just had my pelvic ultrasound earlier. Tinanong ako nung OB sonologist kung nagbbleed ba ako. Then I answered No. Tapos sabi niya mababa daw yung inunan or placenta ko. Meron po ba sa inyong ganito din yung condition during second trimester pero naging okay naman? Salamat po sa pagsagot! ?