Do i have ibd or ibs?

On the 3rd February, I gave a stool sample which came back with a faecal calprotectin level of 512. It then went down to 216 on the 11th February and then to 61 on the 27th February.
I was referred to gastro by my GP because they were concerned about the raised calprotectin. I had been on the waiting list until about a week ago, when I finally had a phone consultation with a gastroenterologist. I explained all of my symptoms, including mucus in my stool, constipation and diarrhoea, bloating, abdominal pain and fatigue. He told me that I couldn’t have IBD because people with IBD only have diarrhoea and not constipation, and said that I could have IBS instead.
After the telephone consultation with the gastroenterologist, I’ve now noticed that even though I don’t have blood mixed in with my stool, I have had some rectal bleeding after having diarrhoea. I’ve sent off another stool sample and I’m currently waiting for the results.
I’m honestly quite unsure about what I should do or think at the moment. The gastroenterologist said that I’ll have a colonoscopy and an MRI scan, but I’m still waiting for the dates. I’m just confused because of my previous high calprotectin result and all of the symptoms I’ve been having