Pregnancy symptoms after going off of the pill?

So, I went off the pill on the 24th of October. Since about 2 weeks after that, I've had symptoms like bloating, etc. About the 24th of November, I had a very light period. Since then, I've had uterus twinges, cramps in my ribs, lots of gas and bloating (that hardly ever happens and I haven't changed my diet), and lower back pain. I've taken a few tests--all negative. Could this really be just from going off of the pill? Anyone have these same symptoms JUST from going off of the pill? And for a whole month? Thanks.