Having Irritable Bowel Syndrome And Lactose Intolerance. Having Loose Stool With Abdominal Cramps. Done With Tests. Further Treatment?

Question: Hi. I have a history of irritable bowel syndrome (since 2006) and lactose intollerance. I discovered the lactose intollerance only in 2011 and stop eating food that contain lactose. I try very hard to do not eat nothing with lactose. My IBS symptoms improved but only for 50%. This year in february I started with very loose stools, sometimes was yellow diarrhea 1 hour after eating, in the day I have 2-3 loose stools with abdominal cramps, lots of meteorism.
I done blood tests and fecal tests (calprotectin, bacteries, parassites), and abdomen ultrasound. Blood tests were all normal, c-protectin negative. Abdomen ultrasound all perfect. No bacteries, no parassites, no candida was found but only a high calprotectin value of 170 (maximum for normal people 50). This value was in march 2013. I started also with probiotics (bioflorin). Then in next month of april my symptoms subsides and in april calprotectin was 30 ! In next months I had normal stool with no pain at all, I have only IBS symptoms like meteorism and borborigms. In ende july i started again with symptoms like loose stool and abdominal pain and lot of gas. This time no yellow diarrhea but I have 10 days of loose stool 2-3 times daily. I retest with blood and calprotectin. Blood all normal. Occult blood in stool was negative but calprotectin was 82 !!
I tested also for celiac disease and all was negative.
Now I'm scared about the possibility of inflammatory such Chron's or Ulcerative colitis.
I have a chance maybe I can only have irritable bowel syndrome ?
I don't have a colonscopy but I have a rettoscopy and found III grade hemorroid. Can this explain this variable levels of calprotectin ? Thank you.

Thank you.

I read that IBS have low grade inflammation on intestine.
Is it possible that low grade inflammation can reflect on midly elevated calprotectin level ?