So I did my next injection today and the bouncing technique works really great for me !!!
I managed to relax a lot more than usual and put on a nice song (Marilyn Manson works marvelously for T injections !!!

), it was much less stressful than the last time and totally painless with this technique.
Wow, thank you all so much for your very useful advice, my problem seems to be solved

Have a great week !