Actually I think you are being reasonable and just being sure of your safety. That's actually very important and highly commendable. However there is a limit on how much certainty and assurance a person needs. If your fears seems irrational then there can really be a mental health issue involved.
Now the practical thing for you to do is to tell your parents about your concerns and ask them if you can consult a clinician. A clinician will be able assess you and provide a diagnosis of your case, ultimately giving you a sense of certainty.
In the meantime try some self-help methods like meditation, mindfulness programs, and don't expose yourself to further fears and cause for concern. Regarding the delusions I don't think you are having one however I can only speculate which is why diagnosis is necessary.
In the meantime consider taking endoca hemp products. It's a nutritional supplements which has many medical properties. It has antipsychotic properties which battles psychosis disorders meaning that it can reduce delusions and/or hallucinations.