Dairy intolerance?

I am taking Zoloft (prescribed by GI) and it does seem to be helping with my mood (anxiety). I am still battling constipation and upset stomach and I wish like heck I could figure out the reason for the upset stomach. As you can tell that is my biggest complaint. I was told that the Zoloft will help with my IBS and so far I am waiting for some results. So now I am trying to get to the bottom of my symptoms on my own. Any help or advice would be appreciated.

I am highly intolerant to all dairy products and can no longer consume anything dairy. It's been a slow progression over the years to reach this stage .... starting with milk.

It's good you are already aware of some of the things you are unable to tolerate. But maybe you could think about getting some food allergy/intolerance tests done? I finally did this as I could no longer see for looking what was causing me so much stress and upset. As well as the things I suspected, it threw quite a few suprises at me and now having cut out all the allergy causing foods, my IBS has improved quite dramatically. Still not perfect but MUCH better and manageable!