Bleeding/spotting

Hi mga mommies, Im 22 weeks preggy, may I ask who have experienced spotting? I have taking meds that needs to take as needed sabi ng OB, mababa daw kasi placenta ko. I just want to know if this is normal, especially sa mga moms na naka experience nito. hindi sya madalas, last 2 weeks ako yung pinaka latest, tapos ngayon lang ulit. naka-bed rest ako for almost 1 month. thank you in advance for your answers. #teamoctober