So about 2 weeks ago I started to get these really loud growls and sharp pains in my stomach so at this point I had just started taking my medication for ADD (concerta) and it's really hard for me to eat I had lost already 15 pounds in 1 week so I had to start eating again but the sharp pains would still come and I would still get loud growling sounds I get it like all say now even if all I do is eat and eat , drink water what do i have?