Talk to Gynecologist on Pregnancy

It's 5th week of pregnancy, I had slight discoloration of my vaginal discharge of pink color today and 2 days back I was of slight brown color but then it turned to normal white within the day. last week I went with the same complain of discoloration to my Dr she did ultrasound and said everything is normal and gave me DUPHASTON twice daily.

I wanted to ask. is it normal to have such discoloration in beginning aur is it something alarming cause I'm taking med. and even after that discoloration is making me conscious.