Not really sure what's wrong with me, I need medical advice?

This may be kind of gross or whatever but I need help because I don't really know what to do... So it started when I went camping and didn't go (you know, number two) for five days. I just really never felt like I needed to. When I got back I did and assumed everything would be fine. Things got worse. The next day I started having sharp pains in my lower/mid back whenever I moved or walked. Also when I applied pressure to my stomach it hurt all the way from above my belly button to the left side of my abdomen underneath my ribs. But being on vacation (not where I live) I decided not to mention it because health costs are higher here. But I woke up this morning nauseous, sharp pains in various parts of my stomach, and just my feeling well in general. The sharp pains have gotten much worse within the last two hours and so has the nausea. Thank you to anyone who takes the time to read this, and can offer any information to help...
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I need to be clear to everyone... I HAVE GONE TO THE BATHROOM SINCE I GOT BACK. The pains have continued even after this...
Not really sure what's wrong with me, I need medical advice?
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