Frustrated and confused!!

I am officially two days late for my cycle. I am very regular. Always 28-30 day cycles Saturday was day 30. For about 3 weeks now I have been having symptoms. It started with intense heartburn. Then exhaustion. Then lower back pain. Extra saliva.... to the point I am choking on it. My emotions are so far out of check my poor husband is on constant guard against me. I was an on/off smoker (now completely off for going on two weeks 👏) and suddenly cigarettes taste bad, like awful! I have become sensitive to smells. I have noticed very very mild breast tenderness (no color change) and very mild nausea. These last two are within the last couple days. I took my first HPT last week, before my missed period. And then again yesterday (the day after my period should have started at 30 days), and again this morning. Everything comes back negative. Am I testing too soon or am I just NOT pregnant?? Either way, at this point, I just need to know so I can move on. It's making me crazy. I can't concentrate on anything else. I want this so bad. I'm afraid I am going to be devastated if it turns out to be nothing. Advice please!! Has anyone else dealt with or is dealing with this? What were your outcomes?