OH MY GOD, I got these same E X A C T symptoms yesterday and Im also 18. I've been on humaworm for five days now and I think however that mine were caused due to me taking humaworm RIGHT BEFORE my breakfast yesterday. I got the most insane sharp pain in my upper stoamch that I have ever encountered in MY LIFE, it literally felt like someone was stabbing me in my upper stomach, sides, and then groin since the pain kinda fleeted down. I got the same acid reflux too, I couldn't stop burping and my stomach was making all these weird noises, I didnt vomit either but was quite nauscious. Im going to continue the cleanse since now my mind is at ease and I know other people have gone through this as well. But I honestly did think that there was something wrong with my body.