How many times can you mess up? As many seams as you sew sometimes. :lol:
I've had that experience before also. Sometimes I alter the pattern just to finish the project sometimes I donate it to the orphan collection at my charity sewing group. Sometimes it sits on my shelf as a PIG/UFO. I'll come back to it everyonce in awhile and sometimes something clicks and I can figure it out and finish it.
Good luck, it looks very pretty so far. It would be a shame not to finish it. :lol: