how to get over a mental block

i have this mental block about inserting fingers more then just under 1 cm and it kinda stings if i try and im just scared ngl

could it be vaginismus ?? i think its more thag i tense cause I'm scared but idk

also i have the same thing abour organsms, i never let myself cum because for some reason im worried about something going wrong and then how do i get to a doctor without my parents asking why my mum forcing to know every detail hh