Are these symptoms from stopping the pill?

I just stopped the pill 2.5 weeks ago and have been nauseous, sore nipples, tired and moody which can be common.

However the last few days I've had lower back pain, sore abs (like I've done a lot of sit ups) and weird tingling on and off in my uterus. Took a test this morning and it's was negative. Are these just symptoms from coming off the pill? Did you experience these??