Hello,
I'm only 19 and I also experience this severe aching where my stomuch is, which gets worse, sometimes it comes when I take painkillers and sometimes if i have alcohol, but most of the time it will come and go as it pleases even if I havn't had either painkillers of alcohol! I also get the hunger pains, which can sometimes get really painful, even though eating wont make them go away, and I too get very tired alot of the time!
I havn't yet been to the doctor's about this as I didn't know other people had it too and I thought it was indigestion or something, but now know for sure it's not, hope we can all find out what it is!