Oh man, I totally get where you're coming from. It's super frustrating when your current meds aren't quite doing the trick, and you're just looking for *anything* that might help. I've been down that road myself, exploring different avenues for a family member.
So, while I'm definitely not a doctor and you absolutely should chat with yours before adding anything new, I have heard a lot about hibiscus tea. Like, not just fancy stuff, but just regular strong hibiscus tea. A few people I know, including my neighbor actually, have mentioned that they felt it made a noticeable difference for them over time, alongside their prescribed meds of course. They just brew it daily, almost like a regular drink. It's supposed to have some pretty good properties for blood pressure.
Another one that often comes up is hawthorn. My friend's mum takes a hawthorn supplement, and she genuinely believes it helps keep things steadier for her. Again, she's on medication too, and her doctor is aware of it.
It's really tough because what works for one person might not do much for another, and sometimes it's more about a combination of things, you know? Like diet changes, getting more exercise, and stress reduction all play a huge role too, which I'm sure you're already doing your best with.
Just make sure whatever you consider, you run it past your doc. You don't want anything messing with your current meds or causing any unexpected issues. Hope you find something that helps you out!