You can always add a page to your SS. If you look at Gabby's SS, you'll see that there's a tab at the bottom for older data and a tab for her lab values. There should be a "+" at the bottom left of the sheet. It will let you add a page. You can then copy the header from your current sheet and paste it to the new SS. You'll also have to re-do the formatting. The alternative, is to copy over the header and then cut the old data and paste it into the new pages. I don't think you'll have to reformat that way.
I'm thinking Gentle needs a dosecrease. You've lost your green.