just feeling worried

I'm 16w1d pregnant and this is my 3rd pregnancy but 2nd baby, I started having feelings of flutters at around 15w but suddenly all has stopped no matter what i do. I'm just nervous because of a MMC 2012 :/ I'm a little on the larger side so also don't see my bump growing or anything guess I'm just worried 😩 anyone feeling the same? I have a scan on Tuesday and just so nervous for it and then midwives next Thursday x