Made a huge mistake today and drove with my parking brake at least partially on. Went about 10 miles, half the time on the freeway going about 60 mph. I didn't notice it driving differently, or hear any odd noises while driving, but when I stopped and got out I definitely noticed a smell. It slowed down and seems like it stopped just like normal, but I am definitely concerned about the smell. How badly have I screwed up? Is there anything I should look for other than the brakes failing?