RH NEGATIVE

is anyone rh negative? Have you had a previous pregnancy and needed the RhoGam shot? Iv had them with my first two pregnancies but they were back to back. I’m 5 weeks and 4 days pregnant and my last shot was after I had my son almost 2 years ago. Do I need a new one? Or is it still the same with just getting it at 28 weeks and then after birth? I don’t have a general checkup until I’m 11 weeks along and I’m just trying to make sure this baby is safe and healthy.