I failed two pregnancy tests, three if you count the one done at the hospital after I was in a car accident. So those aren't necessarily full proof.

As for the sickness part... Both of my pregnancies were very different. I was sick as a dog with my first one for 7 out of 9 months (brief respite in the middle) I also had severe cramping and a scare of a miscarriage. Fortunately everything worked out well, and I have a very healthy boy that will be turning 8 next week. My second pregnancy no illness whatsoever, in fact I just wasn't hungry at all. It was much easier all in all, but I ended up with a thyroid condition, that I believe started during that pregnancy which resulted in a beautiful baby girl.

Either way, however the tests swings for you I hope that you find some peace in the answer.