Girls, who had an ultrasound with a hyperechoic bowel and hyperechoic …

Girls, who had an ultrasound with a hyperechoic bowel and hyperechoic lungs placed (at 21 weeks of pregnancy). My heart rate is 7 mm... Diagnosis: VUI. Intrauterine infection. GDM. Where did the cyst come from.... Ultrasound at 16 weeks was normal. The doctor said to undergo treatment: interferon suppositories. All the tests for STIs have been negative. Genetics came out good in the 1 screening. The only thing is that I got sick with a rubella infection at 11 weeks of pregnancy... What is this hyper echo-genicity? A cyst? What is it? How do they treat it? Is it dangerous?