Good luck with the blood thinning! Ive recently started on anti hypertension tabs, and feel tons better.. I did go to the gp, as i am in favour of man made meds.
You could argue that there are no natural medications, as we "should" manage without anything but food and water, air and a bit of sunlight, ( and possibly whisky) but part of civilisation has been the use of herbs and minerals growing or dug up and used for the artificial effect on body systems. "Modern" meds are a logical extension, id argue, of that long history.. The advantage now is that with the increased understanding of some processes in the body drugs and treatments can be tailor made ie you wont find some of the new anti cancer drugs in nature, but many of the old ones were, and are still in use..
i'd agree that finding a registered herbalist is a good idea, but sometimes, while helpful, herbs are not enough, so perhaps see the GP as well to get all options...