I’m getting worried...

Taylor

Last period: 11/30

Typical cycle: 30 days

Not sure when I ovulated but I had sex on 12/18. We used a condom paired with pull out method. I’ve had horrible cramping since the day I had sex, back pain, headaches recently. My period is 2 days away but I light brown spotting today when I wiped that went away.

Is this likely implantation bleeding? I do not want to conceive right now so I am majorly concerned.