I often see people saying that if I indulge in my compulsions and test myself, it'll make it worse. I guess I'm just wondering how it will make it worse? Do the symptoms get more believable?

That’s a good question: From my experience, If I jumped into the compulsive need to find an answer, I never found one because the fuel behind finding the answer is an anxiety fueled need to answer the question. Than rather than getting a satisfactory answer, your mind comes up with more questions, and is still fueld by fear, and it creates and existential loop. Calming aporoaching the answers in a mind not filled with anxiety is the way to gather true information and true answers, but getting to that point is difficult.