Late but negative...too early to tell?

Suzanne • Wed, Dec 09 • 24 years old. Engaged to the most wonderful man I know. We have been trying for 8 months now to conceive. No luck!

My period was due on 12/1. Still no signs. I have taken 3 tests since and all negative. Too early to tell? When should I test again? Any help is appreciated! Thank you!