what you do is stop checking the internet for problems you don't have

being afraid is part of what causes this

when/if you have sex you need to trust the one you're with and be sure that you want to do it

you will be fine

You have a serious problem alright but it's not "vaginismus".

a lot of times people read about an illness and are worried they have it but sometimes it's just overthinking and you're truly just fine. but if you are that worried u can go to a doc