Could I be pregnant? Help pls!!

Im gonna be honest I have two different apps, because I wanted to track my period and ovulation day to see which was more accurate. This month I was suppose to get it 20th(on <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a>). In the other app I was suppose to get it on the 27th. Obviously both very different dates but today is the 29th and nothing.

I have felt very nauseous and my boobs have been sore.

My period are irregular.

My husband and I pretty much have sex everyday so there is no way that I’m missing my ovulation day.

We have been trying since March.

And I’m 21.

What are we doing wrong??!