Too much amniotic fluid concerns

I had a prenatal visit yesterday at 24 weeks and 3 days. My midwife measured my belly and said I was measuring bigger (30weeks) and she did a quick ultrasound and told me she had some concerns about too much amniotic fluid so she is sending me to get another ultrasound to make sure everything is ok with baby. I'm super nervous that something might be wrong. Has anyone ever been through something like this ? I didn't think I was that big but here is a picture of me so you can see