Hi there, I'm right around your age, 23, and I've had alot of the same issues as you the last few months, in addition to other non-stomach symptoms, and it has even sent me to the gastro doctor for a colonoscopy (only anal fissures and hemmoroids were found) and to the gyn (I'm female and was also concerned about Ovarian Cancer), and the doctors cannot seem to find anything serious and want me to consider anxiety. I would suggest you get it checked out, and hopefully everything turns out fine, and if does, and symptoms still persist, well welcome to the anxiety club, lol