Physical risks of LSD and other psychedelics?

I know LSD can be harmful psychologically if abused or if you have pre existing mental illness but what are the physical dangers? From what I have read people describe it as a miracle drug with no physical dangers but that seems almost too good to be true. I’m asking because every almost every time I trip my heart rate goes crazy fast and my stomach sometimes hurts like crazy not every time but often enough that I notice it. Feels kind of like my muscles,fat,organs and bones have been all tied in a knot. I also fart a fuck ton on acid lol.