Late period

So my period was due the 25 but it never came. But I took 5 tests on different days and two the day I missed and the next day all were negative. So I put that period was late and it moved it back two days. So I have done that Little bit. Tomorrow I will be a week late. My boobs don't hurt I'm not getting any signs that I'm pregnant. But my app has changed ask my fertile days so I'm not even sure when I ovulated it says I'm cd34 and 14 dpo. What do you all think? And is there anything or the counter to make me start my period?