Disappointedly Needing Answers

As of today I'm 10 days late. My husband and I are cautiously excited. We have been trying for our first since November with no luck. So when I was two days late we instantly decided to take a test. Sadly the results were negative. Since then I have taken 3 more tests, all negative. Today as I was using the restroom I noticed a drop of blood. It wasn't really enough to even call spotting ....but who knows, maybe it was. Right before this I was about to schedule an appt to see a doctor to confirm pregnancy, now I'm not sure what to do. 
I should also add that I've NEVER been late ever. 
Does anyone else out there have any clue as to what could possibly be going on?