270 is quite high. However, if you felt like it was higher, then you probably should have repeated the test to be sure it was accurate.

I've been diabetic for years and I've noticed that sometimes I feel like my BS is screaming high and it's actually the opposite, so my "feeling" is not always accurate. I have noticed, though, that I get that sick extremely high feeling when my blood sugar is rapidly going down, like when my insulin kicks in.

I would definitely talk to your doctor about your feet. The fact that they are cold and you are hyperglycemic can be the sign of poor circulation or possible nerve problems that are better diagnosed and treated early.