Please help a stressed momma out 🤦🏻‍♀️

So I am trying SO hard to get pregnant and my husband and I have had sex every day that I was ovulating (I have the test strips) and my period is due on the 16th but I have been feeling sick and have been constipated like never before (tmi). Anyways, I took an early pregnancy test because the symptoms and it was negative, can it just be that it’s to early (it’s 6 days before my pissed period)