Have you tried to flick the syringe (or pen) a little bit with your index finger to see if it comes to the top?
I don't remember if I had never had a bubble in mine before. I took it for 4 years. Anyway, I don't know that it matters if there is one in there or not. I think the whole bubble thing is bad if you are injectiong something into a vein, because air can go into the heart or something... (i think), but I don't know about just the subq injections if it matters or not.