Pregnant?

Hey ladies!

I had unprotected sex from the 10-13th, all 3 days i was ovulating and I’m not on birth control.I’ve developed acid reflex the past couple of days, mood swings, nausea, fatigue & random cramping and sharp pain on the right side of my abdomen. My period is due to start in 2-7 days days (normally start between the 25th-1st). Today I’ve been cramping and when i stick my finger inside of me there’s a little blood. Should i be worried? A couple days ago i took a test and it was negative. But idk if it was too soon to take one.

I’ve heard pink discharge could be a sign of implantation bleeding