I was born 17 weeks premature and I was diagnosed with the term "androgenisation" which I think is now outdated and I'm not sure what the term is called nowadays. I was born biologically female but with ambiguous genitals - my clitoris was enlarged, however everything else, including internal reproductive organs were female. The doctors were going to surgically correct the clitoris but in the end, thankfully, they decided against it.
I had very low T levels - lower than normal for biological females. I assume the low levels is what caused me to handle the hormonal spikes very badly before, during and after periods. After going on T, it seemed to balance out completely. In retrospect, a low-dose of T would have probably stabilized me as it would have most likely made up for the lack of T in my body.
Growing up, I have always had a very androgynous face, it used to be dubbed my "baby face" because I look like a child, even though I'm hitting mid-twenties.
I never considered myself intersex until I researched it and found that having ambiguous genitals is considered a trait of the intersex condition, regardless if you have undescended testis or descended ovaries. Then again, everyone is different and I'm willing to bet there will always be that minority of people who will argue that you must have this, this and that trait to be "true" intersex, just like those who demand you have to have certain traits or qualities otherwise you're not a "true" transsexual.
Hopefully, someone else can help you out! Sorry I wasn't much help 🙂