Now everything is fine. I also went to get a blood test done two days ago, tested CBC and CRP (inflammation marker), everything was normal.
I don't think hitting bone is always of no consequence. There is a term called SIRVA (shoulder injury related to vaccine administration) which is for cases when people get their vaccine administered incorrectly. Surely it applies for all injections but regular people mostly get only vaccine injections done. Most of the time it's a non-issue but sometimes people recover for years until their shoulder is pain free again.
I was lucky and everything is fine.
I do have a panic disorder and I get worried easily. I have it from the time I had a medical check done which required a cannula. Something was done wrong by the nurses and bacteria entered my bloodstream. Few days after the medical check I had 40 C (104 F) fever. I went to the hospital and I was in a pre-sepsis state. Well, you can imagine that such a thing leaves a bad memory.
Because of the above I use nearly 20 alcohol swipes for one injection because the question "did I clean it good enough?" is constantly pounding in my head. Probably it is a form of post traumatic stress disorder.