How soon can you be nauseous ?

My last period started September 23. I’ve thrown up 4 times since and my period is coming in 2 days. I took a test 7 and 5 days early. Both negative. What are the chances I could be pregnant if both were negative. I feel like yes those were early but with my first pregnancy it showed positive 8 days early so I’m a bit thrown off. Also had white milky discharge today and I’m not on my ovulation window.