just had my appointment where i thought i was going to get the anti-d, i am 28 weeks. however the doctor said they only do them on mondays and that i was to come back next monday. so i will be 29 weeks and getting the anti-d. when i looked at my blue book she has written that i am currently 27 weeks. so originally i thought she knew what she was on about and it doesnt matter if you get the injection at 29 weeks, but now i am thinking well if she thinks i am only 27 atm then i am on track to get the shot next week being 28. long story short, is it ok to get the anti- d at 29 weeks?