Bottom growth questions

I took my first T shot yesterday, it went better than I expected and didn’t hurt. I am on a low dose because I wasn’t sure how T would make me feel. Oddly enough, this morning I woke up with bottom growth, it isn’t a big difference but I definitely got some morning wood or something ( it was literally hard and popping up to greet me- ) which was surprising since I figured it would take at least a couple days. It has been hard nearly constantly on and off today. A couple times I got what felt like a slight pinch or poke, kinda hurt but I’ve heard sometimes it hurts a little. I wanted to ask if anyone has any advice on getting it to calm down a little bit? It’s annoying since I’m a college student and need to focus on other stuff besides what’s in my pants. Any recommendations for the pain? The pain isn’t constant just every once in awhile it feels like something is stabbing my little guy with a needle.