5-6 negitive test..

I got my implant (nexaplanon) may 15th. I had sex may 30th using the pull out method plus the bc. I was suppose to start june 6th. I took a test june 6th. June 13, 14, 15, 16, 18th all were negitive. On june 18 I did cm check (wipped around my vagina cavity with some toilet paper) and had red blood like a maron/darkish (sp?) color. I also had some today (june 19th) but it stopped around mid day. None ever came out on pad or showed up when I wiped i just noticed when i did cm check. I have some cramps but mostly some ovary cyst pain. My cervix is also low and open.