TTC ...Helppp!!!

So my husband and I have been trying to conceive for months now but before that I was on the birth control shot. I was scheduled for a shot last September and decided to not get it. While on the depo I had no period so it took awhile for it to start again. It's pretty regular now so...Here's my dilemma

I am 9 days late

Cramps

Fatigue

Appetite in overdrive

Headaches

Nausea

Heartburn

Sore and swollen boobs

Very emotional

I took a pregnancy test today and it came back negative 😔

Has anyone gone threw this?

Is it possible that I'm still pregnant?