Sososososo whyyyyyyyyy did I go to Ollie's and see oodles of the exact same yarn... ?

I couldn't believe it! I know I've had this yarn for LEAST 2-3 years. This is downright eerie. Ollie's (if anyone's not familiar with them) is one of those "overruns/overstock" stores like Big Lots and never have the same stuff regularly.

I only bought 3 balls which should be more than enough for the set. I'm just now coming back from the store.

Thank you for your help.

Should I just do half-double-crochets like the hat, back and forth until I get enough length for the scarf? Or do you suggest something else?