AVM's & Supplements

I have AVM's in my Colon and maybe in my small intestines. Don't know but my Gastro doctor said I could have them anywhere. Now I'm under a physican from University Cancer & Blood Center to monitor my bleeding. Right now I'm on Iron Pills. I have had an iron infusion more than once but they are expensive. Right now my stomach has bothered me for a long while. Been to the Gastro this past year or so numerous times. This time he took a stool sample and there is blood in there. I also have pre-cancerous polyps. The last colonoscopy was 2019 and I asked when I could have it again since this is hereditary. He said next year, but now because of the blood they are setting me up for a endoscopy and colonoscopy. The last colonoscopy I was told it was ok, but upon reading the report I read something about not being able to get through the ilium which I don't know what that is about, but nothing was told to me.

I was told years ago to take fish oil pills. Now I find out that they can cause bleeding. I also started taking Turmeric, and find out they can also cause bleeding. Doctors won't talk to me about it since they are supplements. The instructions for the colonoscopy no GARLIC, I use garlic in my foods every day, but did not know that could be a blood thinner. Now they say no Vitamin D before the colonoscopy. Never had that told to me before. Also, I went from regular fish oil pills to Krill Oil pills and find they can also make you bleed. I stopped taking aspirin and Celebrex when I found out I had AVM's but am so confused. So, what Herbs supplements can be safe for someone with AVM's? Any suggestions.