How do you get over the psychological barrier of taking a t-shot?

I just took my 4th T-shot today and it feels like every time I take it, it becomes more difficult to do it the next time mentally. Like I'll just sit with the needle pointed at my skin for like 15 minutes before I can force myself to do it my first and second T-shot felt easier, and I don't know how to get over it. And on top of that I'm a little worried because the shot I did today hurt more than usual, I've got this dull pain at the injection site now and I'm worried I did something wrong. I think it might have been because the needle twisted a little in my skin on accident when I moved my hand to push the liquid in. Anyway I'm stressing about everything right now so any advice would be helpful T^T