IBS-Infection-or more serious?

I first started noticing what I believe to be stomach bloating at the beginning of this month. Since then, it has progressively gotten worse, to the degree that I no longer have an appetite, or when I do eat I get indigestion and pain right afterward. This pain can last for hours. Also, since I lost my appetite a week ago, I've lost close to 7 or 8 pounds. Additionally my bowel movements in this last week have been loose (not necessarily diarrhea) and float.

I've had blood work this week that don't indicate an infection is present and my enzymes and such for my liver and pancreas appear to be normal. I had an ultrasounds on Wednesday and an EGD on Thursday which were both normal.

I'm getting concerned. IBS was mentioned, but only in passing as a possibility. Not to mention that the symptoms I've looked up about IBS don't include some of what I'm experiencing. I've noticed some pain in my back too, but I'm having a hard time discerning if it's muscles or something more internal. There is pain when I press on my stomach area and also the area right above my navel. It also feels like my colon is tender, especially on the lower left side.

At this point, I'm just spooked by the bowel movements, weight loss, loss of appetite, and the fullness I'm feeling either in my stomach or somewhere in the GI system. I'm also experiencing chills, fatigue, and weakness, which is why I thought it was an infection...but the lab tests seem to refute that.

Has anyone else experienced something like this? I realize I'm all over the place, but like I said, I'm a little spooked. Not to mention that it's the weekend, and the only way to get any kind of medical treatment is Urgent Care or ER...neither of which is really a viable option at the moment!! (It's not an immediate life-threatening emergency and Urgent Care is really only equipped to handle acute infections and minor injuries)....

I know I need to follow-up with my Doc on Monday, but it just seems like today took forever to get through and tomorrow seems like it will take an eternity.

Thanks for letting me ramble, let me know if anyone has experienced symptoms...and/or uncertainty...like this before. Thanks for listening.

good evening everyone, I wanted to share my experience too, only an hour ago, I was in agonishing pain, my colon/rectum was in severe pain, It's like a knife is getting inside my anus and stabbing my colon, the pain is extreme I could not move, could not breath and crawling and crying.

In my case I am suffering from Irritable Bowel Syndrome and Endemetriosis, Six years ago (2002) I had my left ovary remove because I am suffering from Endemetriosis, my gynecologist scheduled me for a 3 hours and 30 minutes operation, but once they open my abdomen they were surprise by what they saw, my left and right ovary as well as my uterus and intestines are attach to one another, they remove my left ovary as schedule but there is nothing they can do about the remaining parts since they didn't know that inside my belly was a total mess, my gynecologist advice me to visit the hospital for monitoring but eight months after they remove my left ovary they wanted to operate again and remove the right ovary this time, physically, financially, emotionally I know I am not ready for another operation so I asked for a second opinion, the other gynecologist told me that though my right ovary is swelling ( I, gave them my medical history, my first operation and all necessary information they need) it is not big enough to operate and we have to wait a little bit more time so it can pass the size qulified for opeartion, since then I am always having pains in my abdomen.

Four years past since my operation, in 2006, I was suddenly hit by severe pain in my rectum, it was like a knife was inside my anus, I went to my gynecologist and I was advise to see a another doctor, I had colonscopy, this time I was diagnos with Irritable Bowel Syndrome, I was given different kind of medicine to make sure I can control my bowel movement, it did work, but there are times like this, when the medicine could not control the pain, and in times like this comes, I am helpless,

The pain last for about half an hour and its very extreme, even though my doctors assured me, that there is nothing to worry, that it is all part of my illness, I still do worry and suffer in pain even if I am following my doctors advice, is there someone there who experience the same thing I do? can anyone advice me on how to deal with the pain, I will appreciate it very much, thanks and more power