Insulin pen

This is my 3 time taking my insulin. The frist night went fine, second night a tiny air bubble showed in the pen.. called my clinic they said it's no big deal okay fine...tonight I take my insulin and I had to press the button twice to inject it was set to 5 units it went down to 2 units the first press and the second press 2 went down to 0 ..then I looked at my pen after I was done and two more tiny air bubbles appeared! The clinic said if any other airs bubbles appeared to come in and get a new pen. So guess what I'm doing tomorrow picking up a new pen! Cuz no way I'm okay or comfortable with injecting myself to with a defective pen! I'm barely okay with injecting myself period! Wish me luck on my quest for a new insulin pen tomorrow at least it's free to get a new one.