What does this mean? Pregnant?

Heeey guys!

So! I’ll explain in bullet points so I don’t ramble on haha.

1. My breasts get tender around 2 weeks before my period starts. This month they got tender 2 days before my calculated start day.

2. I stared getting cramps the same day my breasts where tender, felt like similar cramps to when your period is just beginning. This has happened like a couple times but no sign of my period.

3. Usually when I have sex very close to my start date my period comes early. I’ve had sex twice, and there’s been no sign of blood, not one drop.

4. I’ve taken a pregnancy test, and all 3 strips said negative. (Taken at 1 day late )

I am now 3 days late with no sign of period, what could this be?

Also don’t know if it’s worth mentioning, but I did one of those inexpensive tests that you dip in urine. Does this effect the result? Would it be worth buying clear blue perhaps?

Guyyys help haha 🙈