OK, that's a good safe number!
Hold off on any more food for a while, then test again in 30 mins or so, just to make sure she's going up and holding the numbers on her own. At that point, and especially considering how long it has been since the shot, you can take the 911 down.
Given that she just had some honey and food, it sure looks like that 49 was for real, and the 1U was too much. When some ProZinc folks come by, you can discuss where to go from here for tomorrow's shot. It will probably depend a lot on what she does tonight and where she is tomorrow.
Whew! Just starting off, you get a low number, but you handled it great!