Phantom Kicking?

Hello! I am currently almost 6 months postpartum and have been feeling movement like I used to when I first felt my son move. I’ve taken 2 pregnancy tests over the past month and they’re all negative. I am on the Xulane patches and have been good about changing them on time and using condoms with them. I’ve only went without a condom twice. Once April 10th and once June 3rd. I take my current patch off Wednesday and keep it off so my period can start. I’m a little nervous about the movement feeling as I am in a new relationship of 3 months. Any thoughts?