Never forget that your discipline of not using porn has given you the strength to start a beautiful relationship. I´ve been down the exact roads, man, it is difficult. Whenever you are not around her and feel an urge, try techniques like cold shower or exercises, reading a book or if really necessary some gaming (it´s what I did to keep my mind busy the first times I was without my partner). If those things are not enough, log in to rebootnation and start a journal entry. Tell us you´re having a difficult moment, that´s okay.
I´m now in my longest relationship, also started with PIED at the beginning. The fact you are in a new relationship is actually a golden opportunity. I would advise to try the method that I used, which did wonders for me. I know everyone is different though...
Do exactly what you are doing now, using your hands, your mouth,... and whenever you are getting an erection, the goal is to not do a complete piv. Yes, try to do the opposite. That mean you can tease her, ´experiment´ with almost-piv. Make it fun and exciting for her. Do only what you want to do and not a step more. Deep down a voice might say ´but you have to do a piv because...´ and you tell it to shut up because you decide what is going to happen and what is not going to happen. You decide! And if she begs for piv, you tell her she doesn´t get it yet. Keep it fun and teasing.
I did that on two occasions for like 15 minutes or so, and it started building confidence stronger and stronger. So much that you feel a natural need to do piv. And then again: you decide!