Pregnancy advice?

So I’m almost 32 weeks pregnant and I keep having this fear of the cord being wrapped around the baby’s neck in the womb. My ob doesn’t do ultrasounds because they’re greedy as hell about it and literally will not do it for ANYTHING so it’s not like I can ask for reassurance.. I’m super scared about something bad happening to my baby, specifically umbilical cord issues and I need some reassurance or anything to help me because I’m beyond paranoid 😥. I wonder what should I do about my ob denying me an ultrasound when I am concerned about my baby’s health? Like they seriously are too lazy to do a quick check? I understand it isn’t medically justified but I’ve only had two 6 weeks and 20 weeks. The thing is though if anything is wrong and if something happens to my baby it’s ME who has to live with it forever not them, and have the loss. I wish they’d be more understanding and listen to me more.