Cervical compression syndrome symptoms and relief?

My apologies if this topic has already been covered here.
So, here is what my color Doppler scan of the carotid arteries showed:
There is an asymmetry during the vertebral artery flow analysis—higher values on the left side along with slightly milder acceleration at the end of both vertebral arteries and the beginning of the basilar artery—indicatingvertebrobasilar insufficiency.
The intracranial segments of the carotid arteries were analyzed via MIT, and those results are still within the normal range.
Of course, I don't understand a single word of this... what exactly is vertebrobasilar insufficiency?🤷
The reason I had this scan done was due to dizziness and intense headaches following a neck whiplash injury.
Can this be managed with just physical therapy? And more importantly, is it dangerous...?😕

This concerns vertebral vascular insufficiency... management involves treating atherosclerotic changes through lipid-lowering therapy, antiplatelet medication, dietary adjustments, and exercise programs supervised by a neurologist and a physiatrist, particularly the latter.

Thanks so much!
I’ve been struggling with high cholesterol lately, and no matter what I do, I just can't seem to get those numbers down. My doctor suggested I might need to start on some lipid-lowering medication, though he mentioned it's likely just a side effect from my antidepressants and isn't cause for immediate alarm. Still, I can't help feeling anxious about it.
Is there a real risk of me facing a heart attack or a stroke because of this? I know these are heavy questions to ask, but I honestly don't know where else to turn...😢
Since I'm only 20, I figured I had plenty of time and didn't need to worry too much, but now I'm starting to second-guess that mindset entirely.