I Had My First Sex. Actually Not Sex. Girl Was

I had my first sex.
Actually not sex.
Girl was virgin
And i was too.
I just put my penis inside her vagina
I was trying to put
It went in but not fully
Then she was having pain.
Then we stopped
Now also she is virgin and me too
I had a cut on my penis but it is recovered.
But i have some doubts now
1. I am highly suffering from itching on my penis and testicles area.What should i do now???
2. Does this half sex(actually not sex) arises to any infection ?(like hiv or aids).