help!

I am due to get my period on July 6th. I took the first response 6 day before test yesterday and today and both came back negative. I have been having mild cramps but not like my typical period cramps, some heartburn but not all the time and lots of burping neither are normal for me. I also throw up after eating certain foods. Could I be pregnant even with 2 negative tests? And I testing to early? Any thoughts/advice would be appreciated thanks!! 😊