Btw the other thing you need to avoid Minnie is thinking about all 37 stitches at once if that makes sense. You have a block of 8 at the beginning and the end, so you are patterning on the middle 21. You've then got what appears to be 6 repeats of the pattern but it's actually 7, just on the final one you only do 1 YO instead of 2 (because you also did an extra, rogue YO right at the start of the pattern part of the row.
So:
[first 8 stitches]
YO
Sl1, K2tog, psso, YO, YO
Sl1, K2tog, psso, YO, YO
Sl1, K2tog, psso, YO, YO
Sl1, K2tog, psso, YO, YO
Sl1, K2tog, psso, YO, YO
Sl1, K2tog, psso, YO, YO
Sl1, K2tog, psso, YO
[last 8 stitches]