Did your three month old take?

We have a wedding right before DD turns 3 months. She took an oz from my mom this week while we were over but then seemed hungry so I nursed her and she nursed another 4 min or so.

I used the Medela scale at a local place yesterday to see how much she takes in nursing (she wants to nurse every 2 hours on the dot, sometimes longer). I weighed her before (11 lbs even) and weighed her after (it said 11.1.8 .. The arrow was set to lbs/oz though??)

Does this mean 1.8 oz? I'm so stressed over this bottle feeding thing! I want to leave a few freshly pumped instead of frozen. DD1 never took frozen milk I think bc of lipase.