Pulling sensation...?

🌸Karaline🐝 • Breathe deeply, tomorrow isn`t yesterday
I'm only 4dpo so I know it's too early for pregnancy symptoms, but tonight I was sitting in my bed and I started getting this pulling feeling in my vagina/uterus, it's almost painful. Has anyone ever felt that? Is it possibly related to implantation? (I wasn't TTC when I got pregnant with my son so I didn't notice this time frame)