I took my 2nd for myself today and i wasnt so nervous but i can never sit still so when i am injecting it into my glute i shake my hand a little bit back and forth then afterwords my ass gets red proly bcuz im moving the needle do you guys have ne idea to prevent this and i pull the plunger back a bit to see if there is blood and if there isnt i continue injecting but once i get air bubbles isnt it bad to inject air into ur system?