Tummy shrinking ?

I had recently posted saying that the doctor advised to do ultrasound because my belly hasn’t grown. I do have an ultrasound set up in two days. Today my anxiety is getting the best of me. Im extremely paranoid that my stomach looks smaller to me. Im on zofran for nausea and that gives me mild anxiety and then this morning i had coffee (I haven’t had coffee in my pregnancy but i was craving it this morning). Should i just go in and get checked today? I cant concentrate because of my anxiety right now. Baby is kicking thankfully, but im paranoid my stomach looks small to me. My husband is saying it just looks like its low now and it doesn’t look small. But i am at the brink of hyperventilating. Please advice something to help me calm down or should i call my doctor or just go in? Im 35 weeks.