Melanoma and moles

Hi , not sure if this is the correct chat.

I 20 f am covered in moles >100 with some large especialy on my back . A mole on my arm changed and developed. Ablack spot and one on my lower back is dark wonky and painful . I went to the derm who said bothe fine and no need for biopsy however i am not relieved for long . I spend all dsy stredsing ahout my moles looking at stats and risk factors with my skin type mole count and large strsnge moles it feels inevatable  i will get melanoma and with a receent health scare having sent me into a spiral i have a gut feeling just waiting for something bad . I hate my moles every time i look at them i feel sick especialy the one that changed she said to look out for ones that stand out but i have countless odd dark ones that di stand out she saud they were fine i feel slightly dismissed even tho i believe her i just cant deal with uncertainty i feel i am being unreasonable but also know the moles are strange and worry due to my age i am not taken seriousoy , i also know i cant get rrgular mole checks which is the only thing that would make me feel at ease