Hi Caroline. Having a MMC is awful - I had one in June at around 10 weeks, followed by a CP two cycles later. I am now 30 weeks pg, and all is well.
TBH, the mc has coloured the whole pregnancy so far. I have been very worried about every change in symptoms, whether I can feel movements or not, and it's only in the last week that I haven't checked for bleeding every time I've gone to the toilet. You are likely to be worried - it is natural, but it doesn't mean those worries are going to come true.
As Desperate said, the symptoms can start to lessen round about where you are now anyway, so it doesn't seem abnormal for you to feel different - it's just very unfortunate timing with what happened before.
Unfortunately, the mw is right - all you can do is try to relax until Monday (I know that probably seems next to impossible, but just try to do whatever you can to take your mind off it). I felt absolutely awful in the run up to every scan, even the 20 week one - I was so sure I would get bad news, so I really do sympathise.
I do hope it all goes well on Monday - remember the odds are vastly in your favour that everything will be fine.