Baby fever 😩😭

Me and my partner have been trying for the past half year to get pregnant and throughout this past month I’ve tried to not worry about it and we’ve been **not gonna lie really been having Intercourse more than usual the past month ** and so we had sex on my fertile days and now I’m late by 3 days on getting my period Long story short I’m scared in taking a pregnancy test and receive a negative, Ive been feeling sick and tired lately-I assume this could be bcs of work... and I’ve been having really bad back pain idk you if you guys think I should wait longer to wait for my period just that I don’t wanna get my hopes up😩