help please

Currently on cd17! I don't track ovulation and I don't really know when I do but on the 30th and the 1st I had unprotected sex and today I've had some light cramps/twinges. Am I just ovulating or could this be implantation? I took an ovulation test and it was negative. I'm still having cramping/twinges and my cm/discharge keeps going back and forth between thick snotty to creamy white and I've had back pain all day. I'm so confused 😭😭