Scan tomorrow

Jessica • Mum to Reegan 13/08/2012 and Levi 01/04/2014 and baby #3 - 23/03/2017
I'm having a scam tomorrow because I'm having very painful cramps and constant headaches. Seen the Dr today and told me he is booming me in for a scan. From my last period I'm 7 weeks and 5 days tomorrow. I don't know what to expect. This will be my first early scan because I've never had this before. Could anybody give me any insight as to what will happen?