It's not all going wrong, Helen - in fact you (and Fred) did really well yesterday so give yourself some credit please! Curve days can def be stressful for owner as well as kitty so give yourselves some little treats today (not necessarily food - whatever floats your boat, and some extra play time for Fred maybe?)
No-one said that treating FD was easy - you know the saying, it's a marathon not a sprint. It can certainly test our patience but don't give up, you will get there with Fred I'm sure.
If you're stuck with the spreadsheet, try starting a new thread and calling it 'help please setting up spreadsheet' or similar - that will bring it to the attention of the techy types here who can really help you out. As Chris says, it would make it easier for peeps to see what's going on and give you advice.
Diana