I got a positive on day 6 with Clearblue digital but wasn't sure it was right cos there there was only 1 line on the test stick. So I carried on testing and today day 13 I got a positive with a cheap opk and tested again with Clearblue and it was a smiley face and the test stick had 2 lines this time.
I got a positive this month using the Clearblue digital tests on Day 8 and then 2 days later with a cheap Internet one, so I don't think it's too early. My cycle is around 29 days as well. Good luck, and hope we both get a bfp this month!