Severe pains from cervical ultrasound and also belly ultrasound!

I am 21 weeks pregnant today with a baby boy💙. Both me and my husband are beyond ecstatic about this but I have a question that I can't seem to get answered very well all the nurses telling me to do is to go to the emergency room. My question is, during both ultrasounds yesterday the technician pushed really hard and since I left the doctor yesterday I have had severe pains in my stomach has that happened to any of you during your ultrasounds? I do have a Doppler and the babies heart rate is fine I did contact Ob/gyn nurse at my doctors office and she told me to go to the emergency room before the snow. I would like to see if it subsides and if not there will be no snow that would stop me from going if I thought my baby was in danger. Does it sound like I'm just having pains because of the pressure? And the weirdest part about it is they are on the left and she was mainly on the right. Any one that has any experience or suggestions please let me know!