Impatient....

I'm going on 7-9 days late (according to 2 ovulation apps). I took 2 cheap preg test 3 days ago and they were negative. My CF is still thick, and there's really no signs of an upcoming period. I have experienced light cramping on both sides of my pelvis. But it only lasts a couple minuets...I'm gassy and pee more frequently...I guess I'll wait another day or so and test again...I just don't understand! Help!