Help..

I think I have a serious disease that needs to be treated at the dentist immediately but my parents are telling me that it's just my wisdom teeth (mind you I'm just 15, i think wisdom teeth come in at 17-30) Plus my teeth are LOOSE. How do I let them know? All the symptoms match up to what I think it is but the procedure is expensive plus we are in quarantine. I dont want to stress them but I dont want to loose my teeth either.