So confused. Help.

So I was suppose to start AF the 11th of this month. Didn't start it. Took a test the 13th. It was negative. Just took two test not even 10 minutes ago and there both negative. What's going on? I use to have irregular AF's but they have been regular for almost 6 months now. I'm not on any birth control. Haven't been for like 4 or 5 years. I'm not stressed. I'm starting too now cause AF won't start. I just want to know what is going on. I hate not knowing what's going on. Lol so does anyone have advice or anything?