Growth scan - should I be as anxious as I already am!!

Charlie

So I went for my 34 week midwife appt yesterday, she measured bump to be 31cm which is the same measurement I had at my 32 week appt.. Its definitely a drop in my growth pattern as we have a chart that we've plotted! Anyway, she's referred me to a growth scan today to check on baby. She said she wasn't concerned enough to send me up the hospital yesterday but at the same time she didn't seem happy with the outcome of my visit either.. I know it could and probably will be nothing but I have not been able to get this off my mind and thinking of loads of negative scenarios! I had a miscarriage last year so literally even the smallest thing makes me nervous! Has anyone else been sent for a growth scan because baby hasn't grown as expected? What could be the reasons behind this and can I do anything? Any input will be greatly appreciated!!