Is This Normal?

I seem to alternate one good lace day with one bad.

I'll have a good knitting evening where I get 4 or 5 repeats done in my available knitting time. The next day somehow I'll mess up one row and end up tinking my whole evening's work. So.Frustrating.

I thought I had plenty of time, but I'm starting to worry that I'm not going to finish in time! Am I getting too far ahead of myself? Maybe this was not the ideal time to try something new...