I got hit on penis accidentally and getting pain on erection. Why?

Hello doctor,

I had a minor injury four weeks ago when my partner while on the bed accidentally hit my erected penis on the left side next to the frenulum under the head. I had some minor pains here and there but I stopped all sexual activities. I did notice a very sharp pain today after an erection only, and the pain was at the same location of the injury. As I wanted to feel if there is a lump I did feel something there at the same location I described above (size of 1-2 millimeters). Please tell me if this will heal in a good way such as no scar tissue or bad way with scar tissue and Peyronie's as my age is only 26 and I do not have any medical history or problems, and the same for my family. I do have varicoceles on my left nut sack grade 1. I have attached a picture of the frenulum. My questions are: What will be the healing time and pain healing time? What are the percentage of chances of developing or not developing scar tissue or Peyronie's at this age? Will you recommend any medicines like Pentoxifylline or anti-inflammatory? I am not taking anything now.