Posted: 20/02/2012 at 17:10
Hi
I would think you are fine at 21 weeks I was in a near collision and my husband had to slam on the brakes, I had the seatbelt across my bump and the next day was in a lot of pain I phoned the maternity helpline and they suggested I went in and I had a mini anti-d injection. Phone your mat unit they will advise you, it was the seatbelt and possible bruising that meant I had to have it