No lights

I have a 2002 Chevy Cavalier, almost 100,000 miles, automatic, 2.2 engine. A month or so ago I was driving and went to make a right and the turn single started blinking really fast. So I went and got a new bulb for the back turn single which doubles as a brake light. While changing the bulb, I see that half of the bulbs on the top break light that goes across the top of the trunk and burnt out, some even broken. I change all these bulbs, but still have no brake lights or turn single on the right. The brake light and left turn single worked fine until yesterday. I had a friend of mine check the bulbs, all were still good but didn't work. He said he checked all the fuses and that they were fine too. So I don't know what the problem could be and don't want to get overcharged for something that could be a simple task. :Mrgreen: