Be careful how hard you press for an answer, you risk being labeled a hypochondriac, then no one will ever take you seriously...it happened to me
loverofpuppies, I too have been through a familiar set of symptoms...maybe not to the letter like yours, but similar especially when it comes to the dizziness and head pressure. I, too, have questioned many doctors and, I also have received this very familiar answer that it's a psychiatric problem. There may be a sliver of truth to the answer they give, but the thing that doctors don't want to hear from people like us, is that we didn't have any psychological issues until the physical symptoms has been there for a while and driven us borderline mad
Thanks for using the forum. I am happy to address your questions, and my answer will be based on the information you provided here. Please make sure you recognize that this forum is for educational purposes only, and it does not substitute for a formal office visit with a doctor.
Without the ability to examine and obtain a history, I can not tell you what the exact cause of the symptoms is. However I will try to provide you with some useful information.
A large function of the veins is to allow for large volume of blood. For example, if you lean your head forward, gravity will pool blood in the veins of your head. This is also why many people have dilated veins of the legs/feet.
If you do not have pure neurological symptoms, there is no indication for an MRI.
Often these symptoms that you describe may reflect emotional/psychiatric problems related to stress (what is called somatization disorder). The latter is a true medical condition whereby instead of a patient experiencing depression or anxiety, they experience physical symptoms, and once the stress is addressed, the symptoms resolve.
I would suggest you continue to work with your primary care physician. Given your family history, you will need to reduce your risk factors for stroke, including blood pressure, cholesterol, etc.
Thank you for this opportunity to answer your questions, I hope you find the information I have provided useful, good luck.