spotting after bfp

Hi.. I'm bfp on 9dpo but after sometime I got spotting which is very very light pink color and did not get into my liner but I could see when I wipe with tissue. It just came in morning. Then again 10dpo morning got spotting. Is it normal ? I am scared coz I'm first time mom to be.. pls help me. Bfp was very strong on 9dpo.