Started Jouney 2 Weeks back and Terrible pain

hello Everyone ,
I Started My NoFap Jouney 3 weeks back . its been a hell of a ride coz i was watching porn every other day and Mastrubating on a Daily basis. My Sex Life was Gone for a Toss coz i Could Not perform (Errectile Dysfucntion) while having real sex and had zero to none Sex Drive.

After Going through a Doctor, he Said that the primary reason for my ED is coz i have been fucked up coz of porn and I am used to it as a Stimuls and I have made My Penis Such that only my grip can make me cum . Therefore , he Advised me a lot of Multivitamins and Asked me To not masturbate or Watch Porn and Exercise.

To be True , I was Interested in Performing Good with my Girlfriend and Make her happy and all and i have Started this Journey .

After 2 weeks, all of a Sudden My Ex Came Back in my Life and i have Started Talking to her . Slowly the texts Turned into Sexting and I was Having hard Ons but i did not Mastrubate and always tried to Stick By my rules of neither Fapping or watching Porn . I know I have Cheated on My GirlFriend and please Dont Go on that.

1. I have Wierd pain In my Left Ball and Pelvis Region... Terrible Pain. it gets worse after i Have hardon and Then when it calms down ?
2. How Soon will the ED Go Away ? Does it Go Away ?
3. Is Sexting = Edging if i am only having Hardon but not mastrubating or even stroking my Dick ?
4. What All corrections i can make ?