I sent you a PM, since I couldn't stay logged on a little while ago.
I would suggest that you put as many numbers as you have in your spreadsheet. Just skip some blank lines, and then add the dates and whatever numbers you have, and then open a new post over in the Lantus Tight Regulation forum where you will have more people experienced using Lantus insulin to help you all the time.
If you remember how, you would want to link this post (so they can see what we have talked about) in the new post in Lantus. You would do that by copying the URL address from this post and pasting it in the new post using the URL button.
Last night as I was trying to go to sleep, I was thinking maybe you could make a sample syringe by drawing a line on one of your unused syringes with black marker for your new dose, and always compare the sample syringe to your new dose. It will help you when you don't have the marks you need on the syringe. I have done this often myself.
Your syringes are marked with 2 unit markings. Between the first marking which is the 2 unit line and the second marking which is the 4 unit line, try figure out where the middle of those two lines would be and that would be approximately 3 units. I think you want to give her 3 1/2 units as 3 3/4 units might be harder to estimate.
Maybe you can draw a line with black marker at what you think is 3 units (right between the 2 and 4 unit marks), and then draw another line at what you think is 3 1/2 units (right between your new line and the 4 unit mark).
Does that sound doable to you?
I'm hoping to go back to bed, for a few minutes, when I can.