The root of my erected penis hurts when I push it back

I'm 16 years old, clearly male and I don't take medicines or smoke. This started 3 days ago, on sunday. I started playing with my penis after the shower, I don't know why I just like seeing it wiggle. 20 seconds in, I start feeling a sharp pain. I immediately stop and the pain goes away after like 5 seconds. My penis was in an "on-the-way to erection" state but more on the soft side, but it was not fully soft. Fast forward a few hours, it's night and I get an erection, so I know it's time😈. I push it to start and I start feeling a sharp pain I never thought feeling was possible. That hurt like crazy, but only for 2 seconds. I tried pushing it to its limits and I could not push it far. I have been trying every night to see if anything gets better (or worse), but it seems nothing has changed from the first one.

Additional info.

- I only feel the sharp pain when PUSHING my ERECTED penis, I can play with my soft one how much I want and nothing hurts. I can also get a normal erection without problems.

- My pee looks normal, it's yellow, it's flowing, it's just regular pee.

- I have not yet ejaculated, but I might try.

- I did not touch my self for a week, before all this happend

What could be:

- a fracture: I don't really think this is it.

- an inflammation

Please help.