It might make you feel better to know just how nuts I was:
I was afraid I was pregnant. To be fair, I had literally EVERY symptom. Even my doctors were like "Jesus, are you SURE you're not pregnant? Because...you sound really pregnant."
So...logical worry, right?
Let me put it this way: unless 1. a new religion was about to be formed around me or 2. my lesbian life partner had grown a penis without telling me, it was...let's just say...scientifically improbable that I would be pregnant.
Or, you know, LITERALLY IMPOSSIBLE.
But I was convinced I had developed some sleepwalking issues and had gotten myself knocked up.
God love my girlfriend, who saw me through it. And did not once assume I must have cheated on her to get so worked up in a state over it. (I mean, what else would someone think in that situation? Sheesh.)
Your rabies is no more real than my pregnancy. (I never did find out why I had so many symptoms, incidentally, as they went on way longer than you'd think if they were psychosomatic. I assume hormones, changing medications, etc.) I know the fear is incredibly real and I wish you the best of luck in getting past it.