? Blood in needle after injection

[Melissa and Rascal]

Hey! We haven't been on for while - just coasting along while managing other pets who are sicker...
So we've been using Lantus for over a year and are very comfortable with injections at this point, but for the first time I just noticed a slight pink tinge to the little bit of fluid left in the needle after I gave Rascal her injection.
I'm assuming I just nicked a tiny vessel or something, but is there any cause for concern? Could I have injected into a vessel? Has this happened to any of you?
I will test more in the next few hours just in case.
Thank you!

 

[Melissa and Rascal]

It's been 45 minutes and the insulin hasn't even taken effect yet. I'm thinking if it had gone directly in a vessel she'd be plummeting by now. We are probably ok.

 

[Andy & Pimp]

I always check to see if that last tiny drop came out too. Sometimes it has a pinkish/whitish translucency to it, I always assumed it was just the normal body fluids.

ETA: I find if I hold pressure on the plunger until the needle is removed, it's more likely to deposit that last drop. I also let go of the tent a second before removing the needle, so the skin can relax first.