So confused

I ovulated 15th sept! This is my first full cycle after misscarriage on the 28th July. My periods are usually pretty regular 28-30 days. I’m now on day 35 of this cycle and the pregnancy test Iv been taking have all been negative. I feel very nauseous last few days and feel pregnant?!?! I’m so confused I just want a positive test to show I’m not making it all up! 😢 what shall I do. Ovia predicted my period should of been due last thurs?!?!