Beedle good luck for your scan and everything crossed for you.
Imps so so so pleased your scan went well. This is your baby!!!! And how ironic that you've been fed up of work for so long, gone down to 4 days a week, are preggo and now they decide to promote you lol! That will boost your maternity pay just nicely lol.
Trix it's a bit early for testing, if you had positive ov on 15th you may not have ovulated until 17th? We are the 23rd today, so 6 dpo, even if your body is weird like mine was last month when I discovered I ovulated the same day as a positive opk, you would only be 8dpo!
Keep well done on being drug free 
As for me, well we DTD sat night and had fertile mucus which three me as so early and then I started to feel like I was gearing up to ovulate. Have used loads of opk's in the last 2 days and I have an absolute stonker of a positive result this morning, so based on last month it's likely I will ovulate tonight. Oh and we just so happened to successfully DTD last night even though it was a weeknight and DH was tired from his long day commuting 😊 I am very gobsmacked by all of this. Today is cd17!!!!! If I ovulate today that means this should be a 31 day cycle. I haven't had a cycle that short in my life, apart from the first cycle I came off the pill which is when ds1 was conceived. Even in the last 2 cycles when I was taking 100mg a day of clomid to induce ovulation, I didn't ovulate until overnight cd19/20 and cd20 in the second cycle. So this month is looking like being 3 days earlier than that, but with no drugs making it early! Compared to my usual ovulation on cd26-30. Am trying not to get my hopes up but can't stop feeling that this has to be a good thing.