im on my second cycle and ive been injecting in my quad changing legs each time, and last time i put it in my quad and as i pushed the needle all the way in my quad twitched, so i pulled it out put a new needle on, checked for air and did the same but a bit further away from the first time and my quad twitched again, so i changed legs and it was fine, but does this mean my other quad is ****ed? it feels normal but am a bit scared to inject there again. why did my quad twitch??