How can you really know that you are not pretending to be ace

I have doubts that bother me to my day to day Life. And usually those are intrusive thoughts/urges that i NEVER enjoyed. Its usually thoughts that tell me that im faking being ace or that i do enjoy sex when im VERY repulsed by it. Now i don’t know if im pretending, or if im actually ace. Look, i never focus so much on people, but i still doubt on it and it has becoming worse and worse, and i wish i could believe myself better. These thoughts have happened after i’ve found out about asexuality. And i don’t know if im convincing myself that im ace. I just need help…