You're not alone, bro.
I remember reading about people saying the same thing and thinking "WTF, I feel like a GOD on orals" but then I'd slowly get headaches. After a while I'd get flank pain and stop all together. I'd try starting up again and get intolerable stomach issues. I actually went to the ER because I had those sorts of stomach issues and couldn't take in water. Subsequently got super dehydrated and had a migraine. Couldn't swallow pills and puffing marijuana didn't help, so I went to the ER to get hooked up to an IV. Projectile vomited everywhere lol
I usually do super low dose orals when I'm blasting. I can use a small amount pre workout. I usually do two days on and a day off, then two or three days on and another day off. So I can use them for maybe a week, then all the issues creep back up.