Can it be Crohn’s disease?

Thank you for letting me join this group.
I am new here and I would like to ask your opinion if you think my issue could be Crohn’s disease. (Sorry for my English, I am not native.)
I try to be short: last September (13 months ago) I had to take Dalacin antibiotics for some days and I immediately got diarrhea 3-4 times a day. After stopping antibiotics the diarrhea did not stop. I was tested for Clostridium but it came back negative. The diarrhea than gradually became a…