May be well worth reading up on diet and hypertension.
I had a similar incident to yours a couple of years ago where I was told that my high cholesterol was probably hereditary and that I needed to be on meds. Did some reading up on the subject and ended up cutting out meat & dairy, processed foods but eating loads of fruit, veg,nuts seeds etc and reduced the cholesterol by 70% in 12 months. No need for meds at all now.
Have a look at a couple of vids if the dietary avenue appeals:
https://www.youtube.com/watch?v=LL2cLhOqPsE