24 weeks pregnant 😫

Ok so I have gestational diabetes and I was referred to a obgyn specialist for ultrasound s. So far I had 3 done and so far everything came back fine. My insurance ended this month and I had an appointment for a detail ultrasound. Now I’m freaking out , because I will not get my ultrasound . Should I be worried ?

Ultrasound cost $400 and I don’t have any money 😫😫😣