Could someone please tell me

[greedychops]

Whether it's ok to say :

I didn't use to have x. Or what would be the correct way of saying it please? Am having a mind blank about whether that sounds correct or not.

Tia.

You would say "used", I believe.

"I didn't use to have x", or
"I used not to have x" or possibly
"I used to have no x"

IMHO

"I didn't used to have"

Sorry prism agree with nickel and BoF:
"I didn't used to have..."

I'm wondering if x is an abbreviation for sex?

I think Prism's suggestions are correct

...or x could be "orgasms". That would work in any of my suggestions.

I didn't used isn't correct, though it's widely used, even in print.

Didn't and used are both past tenses, therefore it's not possible to have them together.

Prism is right.

Prism and Bucharest are right.

Thank you very much for your help - I wouldn't line to say what x stands for, but let's just say, I have lots of them now

i have changed my mind.

I used to
i didn't use to.

but it's a rather clumsy phrase.

I would just say "I didn't have" or "I used to not have". I didn't used to sounds clumsy.