Hi. I am new here, and writing this post in hopes that someone can help me with my problem. I am 18 years old. I have a girlfriend and obviously we have regular sex, sometimes multiple times a day, and I've never ever had any issues, I could easily get an erection (even when I didnt want it) and keeping it for a long time wasn't a problem. That was until 2 days ago we tried a new position (I was laying face up, she was on top of me, face up too) and it was fine until one of the "strokes" where I missed her vagina and hit the side of it. It hurt for a second and I felt like a "lightning" feeling going through my penis, but we continued and I didn't make anything of it. But now, two days later, I find myself unable to get an erection. I feel no pain or anything whatsoever and my penis doesn't look any different, maybe just a little bit smaller when flaccid. Im unable to get a full 100% erection, something that was very easy for me before, and instead it gets to 70% maybe maximum and that's when I can get it hard at all. When I hold it, it feels very different, almost as if it has a different shape. It also feels very limp and empty, even when hard. If I let it go for 2 seconds it will instantly become flaccid before my very eyes. I used to be able to get an erection whenever I wanted just by thinking about it two days ago, and now I find myself struggling to even get a semi.
Any help would be much appreciated as I am quite scared about this,