Thoughts and opinions please!!

In the past i have been irregular and i believe it was due to HIGH stress and excessive exercise.. I’ve also had the leep procedure done about 3 years ago but i haven’t had an abnormal pap since. But.. my periods have been regular for the last 3 months and i am 3 days late.. i took a pregnancy test last night and it said “not pregnant” but i still haven’t started. Over the past few days i have been very bloated, some nausea (which i swear my boyfriends semen makes me nauseous.. anyone had this problem?), breast were VERY tender a couple of days ago.. now they just feel full.. and slight lower back pain like i usually due when I’m about to start but not as bad..