I agree with Mel @Bumblebee, there is no reason to wait. I know you are worried but I am sure everything is just fine. Pregnancy is full of aches, pains that can make you panic but I am sure your little bean is just fine! If it makes you feel better, I would go for your scan to put your mind at ease.
@Smiler, Congrats on your little Imogen turning 3! What a great age, I miss it. I know what you mean about the TCC becoming discouraging.
I got AF full force today, BFN this morning and shortly after, wham. I am crushed today and I know it's because I am emotional from my period. I am turning into someone I don't like very much, completely obsessing about this stuff and I am not very happy. I know we have only been trying since the end of September but every month that passes, I become more and more determined to try and control something that is out of my control. I am happy for the month off but all I can think about is March and having my IUI, what if it fails? I don't think I will handle it well and I hate that I am doing this to myself.