I remember when I did my four year training for homeopathy (I’m retired now), a medical consultant pointed out to us how volatile bp is, it’s literally always changing, and if you follow it closely expecting it to always be similar, it can increase the whole stressful situation. It sounds to me that there’s a lot of anxiety surrounding the whole thing for you and it’s almost like you need to drop the subject for a while and forget all about it. I realise you’ve got the colonoscopy coming up but maybe you need to wait again, for this. If you are overweight, it doesn’t really matter what meds you take, as they may not help. Likewise if you’re very anxious, they may not help either. If it was me, I’d cancel the appt, make a concerted effort to lose weight, stop checking my bp and try to relax. As in the previous reply, the doctors don’t always know everything and don’t always know the ins and outs of the way your own particular body functions. Hope this helps a bit.