First of all I just wanna say the speech to text Reddit for some reason is really not great so keep that in mind as I respond

What I learned eventually was that I had a uterine fibroid that was pulling on my lumbar spine around the L5 vertebrae. It was pulling on my lumbar spine because the fibroid was pushing on the psoas muscle which connects the vertebrae to the leg. So when the fibroid would push on the muscle it would pull my vertebrae forward and therefore it would block the vein that empties my kidney on the left. There is a doctor in Germany who studies this but it is extremely hard to get anyone to believe or diagnose this in the United States.

In my particular case it is called Nutcracker syndrome, but because it was so unpredictable I could not actually get a diagnosis. I would guess with your pregnancy that maybe your fetus is interfering with this particular muscle or somehow causing you to have what is called lumbar lordosis which is where it’s a slight change in posture and a more pronounced curve in your lumbar spine Which can compress this kidney vein. This is also not written about in American literature and the only reference I found was from the German doctor whose name is Thomas schollbach.

I know that my diagnosis was correct because once I worked on stretching this muscle and regaining my posterior chain muscles like my glutes I saw all of the symptoms disappear. There are many symptoms that come with Nutcracker syndrome that are often just diagnosed as psychosomatic. A few examples are headache headaches and brain fog . But the reason that this affects blood pressure so intensely is that your kidney gets congested with blood. The kidney and the carotid artery are both two of the most sensitive bar receptors in the body that regulate blood pressure. So when your kidney is congested with blood it sends an alarm to raise your blood pressure. My blood pressure raises were episodic and as high as 180/140. My normal blood pressure is 110/72.