A knotted up sensation coupled with watery BMs is a possible sign of a partial blockage. If these symptoms persist I would call Dr. and/or go to ER. I had blockages in the weeks after takedown - you are very prone due to possible adhesions and scar tissue and/or residual surgical swelling. I don't know what you have been doing diet-wise but I would not be eating big meals. Take it easy until you are a couple months out. People start feeling good and they get aggressive with their diet - and then stuff happens. Been there and done that.