Scan really hurt!!!!

Sian
I had my 20week scan yesterday and it really hurt to the point where I had yo tell her to stop for a minute. I have had 2 other children and have never known a scan hurt . Baby is predominantly on my right side and when she scanned my left the pain was horrendous, anyone else suffer with this?! Baby was being really awkward and covering its genitals, heart and face so have to go back and am dreading it. Been having strong period type pains for weeks too so wondering if that has something to do with it. Xx