What size circulars are you using now...You said size 8, but are you doing magic loop, 2 circular needles or a 16" circular? Of those methods the only one you'd need to switch to another method would be the 16" circular and I'm not sure how you got down to 10 stitches with that one.
So..you never need to switch to straights..what you'd switch to if need be would be DPN (double pointed needles) or another method of knitting in the round such as magic loop or two circulars. HOWEVER..with 10 stitches left you could just cut the yarn with a 6-8" tail and then with a yarn needle put it through the loops (I go back and do it again so it's extra secure, cinch it up and then put it inside the center and weave in the ends. I generally decrease down to 6-8 stitches, but it should be fine with 10.
BTW..I moved your thread to the General Forum. The Blog Forum is only for blog threads and it's not very active there. Not many people would see it there, but will here.
Welcome to Knitting Help!