Afraid ill accidentally hurt my cousin son ???

Hey guys ! i suffer from Anxiety and ADHD , my psychiatrist told me that everything is fine with me and gave me alot of tests to do and he couldnt find any psychotic symptoms or signs , so he is very positive with me . he keep saying that everything i tell him is only anxiety .. in the last few times i met my Cousin and her 1.5 yrs old child i kept having thoughts of "what if ill break his neck" ? or intrusive thoughts from that kind .. i know i wont do anything and i love him dearly and i would never hurt him , but those thoughts are a trigger for me and whenever i think about them i get anxious and cant concentrate .. im on 200mg sertraline btw .. hope you guys have any answers to those weird thoughts !

ive had this for 7 months and im 18 idk how to get them to go away but i have an appointment… if i find something that helps ill let u know. tbh you just have to resist