Ladies, thank you all so so much for your support
I think my biggest challenge in this pregnancy is to stay optimistic (I've had several moments/days of pure happiness, but I think I've worried for many more), but I'm going to make a conscious effort towards that direction! If anything, for my own sanity.
I think I'll just wait for my anatomy scan at this point, which is 2 weeks away anyway, so close enough. And I'll try not to think about that CRL measurement as much as I can. It's very possible it doesn't mean all that much at this stage of the pregnancy anyway. There must be a reason why it's not used after week 13 and is replaced by other measurements, I just wish my doctor had explained that. All he did was take the crown-to-rump length at my husband's request to measure the baby and told us the approximate number, and didn't even say whether that was remotely normal for the baby's age or that it's not an accurate marker at this stage or something. He acted as if everything was normal and wasn't concerned at any point though. Oh well, I'm clinging on to our perfect 13 week NT scan and hoping things still look great on week 20's anatomy scan. On a more optimistic note, I think I've been feeling the baby kick in the last few days. It's only a couple times a day at this point and I still have to be lying down, but I can feel little muscle spasms in parts of my lower tummy, especially on the right. I can even feel the little move when I place my fingers on the spot
I was expecting flutters which I never got, I did get something like tiny bubbles at some point, but that went away for a few days, and then the tiny muscle spasms started. I'll keep an eye on it, but the more it happens, the more I'm convinced it's the baby.
MrsG - I've been moderately constipated on and off in recent weeks, but nothing too bad. The most I've gone without a BM is around 48 hours. My normal had always been once a day and most days I'm still able to have a BM. I don't remember ever straining too much, but you are right, I have felt my bowels obstructing my uterus at times when I was constipated. Maybe my recent bleed was somewhat related to that, at least partially.
Happy 18 weeks everyone hitting that point! Almost 1/2 way through now!!