You can never be entirely objective about your mental condition. But you can try to find objective verification about what was going on, whether that validates or refutes your ideas about the events.
Hemingway thought the government was tapping his phones, etc. Everyone thought he was crazy. It came out after his death that he was right.
Just because it seems improbable to other people does not mean you are imagining it. But, also, the fact that you fell ill means you could have been misinterpreting things due to fever or other temporary mental impairment.
Whether you were coming up with unfounded ideas or were right, the best answer is to seek some kind of objective evidence concerning what actually happened. If you get objective evidence that refutes your interpretation, then you can feel okay about the possibility that it was machinations of a fevered mind. If you get evidence that something wonky was going on, you can deal with it.
Since you were sick, please consider the possibility that it is a little of column A and a little of column B. Perhaps someone did something, but you blew it out of proportion. The truth may lay somewhere between the extremes of "I was 100% right" and "I was 100% crazy and imagining things."
Best of luck.