Could i be pregnant!?

Shelby
Okay my husband and I have been actively trying to conceive for the last three months! December 4th I had a very light "period" (if that's even what you can call it, just brown discharge no blood and no pain/cramping) it was a week early and only lasted two days. I was due for another period December 24th and I never started! I've taken three test and all were negative to start with, but after about 5 hours you could see a very faint positive. I've used two digital test and they both say not pregnant. HElP!!!