Anything but those two!

I have the same problems with my girlfriend, my advice is to be gentle, its not always about getting you penis as far in as it will go.

Try missionary with her legs on the inside, or from behind with her laying on her tummy.

how do i know if a guys' hit my cervix? and does it always hurt?

Usually it does...or at least its discomfort.
It like a twang in your abdomen.At least for me lol.

My wife and I had the same problem when having vaginal sex. Certain positions helped, but we never really "solved" our problem. I guess that's why we enjoy anal sex more...

As anal sex isn't for everyone, just try putting a pillow under her ass in the missionary position and let us know how that goes.

Super deep penetration can hit the cervix, have her move in a position which feels more comfortable and see where you are...try to keep the same angle.

I have found that ad different times of the month with my wife different acceptable depths of penetration is comfortable with her I suggest the best is to experiment with different positions making it fun for both of you

To avoid the cervix, aim downward when going in deep so you go under it. Next, instead of going deep, rub her G-Spot with the head of your penis. This usually leads to mind-blowing orgasms for her which also helps relaxes her which helps the vagina prepare for going deep. right now I'd bet she so fears the pain of being 'banged' that she's tenser than a violin string - which only makes the issue worse.

Understand? Relax, stimulate, bring to orgasm and then, after all that, go deep if you desire.

Lowering the woman's knees generally limits depth of penetration. At the extreme and assuming you are each relatively trim, after entering, lower the woman's legs flat on the bed and place the man's legs outside. This has the additional benefit of increasing stimulation of the clitoris.

Is she completely ready? You said sometimes you hit it. So some times you do not?