Well, I'll start by saying I know how frustrating it can be to have legitimate symptoms that go by without being diagnosed. I've been in the same boat many times, and with some past experiences, it has weakened my trust in doctors. I know it's easy to continue coming up with diagnoses as more symptoms pop up. The first thing you should do is try to pinpoint which symptoms, if any, are chronic/reoccurring. If there are constant symptoms you should go to your GP if possible (as long as they aren't urgent-- in which case you should go to the hospital). Remember, if there are chronic symptoms, going to the doctor's is not going to create or affirm a serious illness. Either there's something wrong or there isn't, going to a doctor just (hopefully) reveals if you do have something or not. If you think you need to go, don't avoid it because you're afraid of a diagnosis.
If your symptoms seem to come up one after another without any overlap or repetition, this very well could be anxiety based. You could still go to your GP, but they might just dismiss it as hypochondriacal anxiety. There's never anything in the slightest wrong with seeing a therapist or just talking to someone if this is just a case of anxiety. Just remember, looking at the internet can be educational, but never serves as a diagnosis. (I myself often fall prey to webmd) If possible you might even be able to call your GP when you're concerned with a symptom, and they can judge whether or not you should come in. I hope this helped a little, and feel free to message me if needed. I actually experience your problem a lot!!