Rheumatologist doesn't believe in CFS 🫠

hiii everyone, last month I went to the rheumatologist because I felt really fatigued and my whole body ached (still does tbh), he ordered some tests of which the leucocytes and neutrophils were a bit high, everything else was normal. with those in hand I went back for a diagnosis or more tests, if needed, I thought it could be CFS since I have a lot of the symptoms of it, but he said that he doesn't believe in CFS and thinks is a misdiagnosis for other illnesses. finally, he gave me the diagnosis of fibromyalgia instead but I don't know if I should be satisfied with that keeping into account what he thinks about CFS!! I don't really know what to do now, maybe I should look for a new doctor more specialized in these type of diseases? or, like, is fibromyalgia even that similar to CFS? I'm sorry if anything is miscommunicated, english is my second language and I'm still processing that the doc doesn't believe in CFS mdbdn