Hi everyone! I'm working on my first sock. I was really excited about making and wearing my it, but when I try it on, I can barely get it past my heel (though I can get it on, but with a lot of trouble). Anway, i was wondering if you can stretch them out besides blocking them, because the lady at the LYS said it couldn't be blocked, though I am going to try. The yarn is made out of 45% cotton, 42% virgin wool, and 13% polyamide. Any tips?