Fainted (vasovagal) during first injection, do I have to finish the injection?

I was very nervous and I think this happened because of that.

So I called my husband to help me and he put the needle in (I didn't even feel it) and started pushing it, but I blacked out and the next thing I remember I was on the floor in the bathroom. My ears were ringing a lot, and so it took me several minutes to feel ok enough to sit up. It must have been around 10 minutes now I think from then. I checked the pen and he couldn't go in all the way. It's 3/4 of the way in.

The instructions say that if the zero is not visible in the little window, to inject again, but it's been around ten minutes. Do I need to change the needle, get the air out again, etc?

Next time I'll definitely lay on the bed first, for some reason that didn't even occur to me and I did it while standing in my minuscule bathroom. I don't feel any pain but I probably hit everything on the way down.