Hey Sian,
I'm one of the people for whom losing weight did not affect my blood pressure.
My BP is incredibly high and there is no reason for it whatsoever, I don't smoke, never have, I'm not on the pill, I don't have a lot of salt/processed foods, there's nothing medically wrong with me - yet my BP is something stupid like 160/110 which at my age it should not be.
I've been on tablets for about 6 years, started off with a very small 2.5mg dose which gradually increased to 10mg as my BP went up. A couple of years back this wasn't even touching the BP so I had to then take another drug (after a whole lot of tests and poking and prodding)
So, I completely sympathise with the taking tablets thing. I HATE it with a passion. However, they keep me from having a stroke (so the doc says) in later life and losing the weight has had lots of other benefits too.
Don't lose weight just to get off the BP medication, chances are you won't, but you have done incredibly well hun, don't lose sight of that.
*big hugs*