So scared for 12 week scan and a MMC

It's on Tuesday so i haven't long to wait.

I'm 12 weeks 1 day today :0) I understand from what I've read online and what I've seen on forums that the placenta starts taking over and mum can start to feel herself again.. But then I've also read online about Missed Miscarriage and poor mums finding out at their 12 week scan

;( and stupidly and probably insensitively I am getting myself all worried to be told that I have had one. Although I know the likely hood is that chance is on my side. I can't help it.

I only sometimes have sore breasts and this is mainly at night time in bed, my nipples have been sore up until yesterday when they feel normal also they feel my normal 32b size & MS has eased drastically.

I also thought I was getting a little baby bump but woke this morning to a flat tummy. So it's obviously just bloat.

I wish I could just accept symptoms come and go etc etc and that everything will more than likely be perfect but I hate one minute feeling pregnant to the next absolutely nothing at all and if it wasn't for the test and seeing the HB on scan at 7 weeks 2days, that I'd laugh if anyone told me I am pregnant.

Is anyone else in the same boat. ??