Doctors bringing me in for a scan

So yesterday I had a slight bleeding and back pain and lower abdomen pain, the doctors checked me inside and my cervix was not open however I have an ectoran on my cervix meaning I could have spontaneous bleeding but i had told them earlier on that I had not felt the baby moving for a few days but I almost always feel it move every day, so today I'm being brought in for a scan as I'm 18 weeks and 6 days today, last time they just did one there and then but this time they've booked me in for an appointment and given me everything I had for my 12 week scan, (full bladder etc)I'm confused as to if this is just a check up or have they basically pushed forward my anatomy scan? Because they were telling the midwifes how far along I was etc etc and saying id be having the scan in a week and a day anyway so they can give me one tomorrow, I so so hope my baby is okay and if it is would I be right in thinking I could find out the gender today? 

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