Implantation bleeding?

Mi

So my partner and I had sex 4/5/19 unprotected, I regularly take birth control so my periods are always on point and on track. I missed a whole weeks worth of birth control because I lost the package while moving.

Well yesterday I woke up to spotting pink blood and when I wiped there was stringy discharge. So I put on a pad thinking it was my period but I have none of my normal PMS symptoms. Later in the day my bleeding changed from pink to dark brown but only when I wiped.

Today I woke up to more dark brown blood that’s goopy but haven’t bled anymore since this morning. My other symptoms are acne, nausea and headaches.

Also, my period isn’t due for another few days. So, is this an early period or implantation bleeding?