Help i'm confused!

Mamame
So i had a clear ovulationtest with the pink stick and a zero with the purple one. I also felt my ovulation clearly. I have 4 days to go before I can take a pregnancytest. I took pregnancytest but they all came out negative. I feel like throwing up the whole week and very tired and emotional. I also have light cramps, most of the time on my left side. I just took a ovulationtest and the pink one is positive and the other one very light (u can't see it clear on the picture). But the purple one used to be very white always if I took it to test my ovulation. Now I'm confused. My ovulationtests say yesy pregnancytests says no.. what to believe? Going crrrraaaaazzy!