So I am trying to make the loop knitting beginner's lace shawl..

  
I have started it and frogged it about three times and abused this poor cashmere silk (Zegna Baruffa Cashsilk, a gift from my extremely generous mother from her stash) cruelly. I realized about two rows ago that I was taking "yarn over" as including "yarn over and knit next stitch" which kept leaving me with not enough stitches to do the matching decreases as I followed along with the pattern just doing my best and hoping it'd all come out in the wash (Yes, I am a fool). I added stitches thinking that "IDK maybe I misunderstood how many I am supposed to have?" (Yes, I did the "I refuse to ask for directions until I have been lost for six hours" thing because I am unfortunately *that* guy)  
On some level, I'm aware I should probably frog it again, and do it right (and maybe also cast on properly this time as well) but also I have long hair and so no one is likely to see this section of the shawl, is there any hope of getting this to a point where I can follow the pattern going forward or should I just unravel, do it properly and not complain about feeling like Sisyphus with a ball of yarn rather than a boulder (which in the grand scheme of things isn't that bad). I have enough yardage (about 10 further full balls of the cashsilk and a couple of extra partial balls) that even if I destroyed the yarn frogging this I'd still have enough but I'd feel very guilty about wasting something so nice.

I have 27 stitches on one side of the center marker and 25 on the other. I was supposed to end this row with 51 stitches so it's not quite as bad as I had thought but also I've skipped a couple of rows in my attempt to fix it because I increased too fast. So I guess I have two questions:

1. Is this such a mess that I should just start over?

2. If no on one, how do I move forward to make something that looks y' know nice (I'll just wear my hair down to cover my crimes)

Getting back on track after grievous errors?