I Have A Question About Colon/ Intestinal Health. I've Been

I have a question about colon/ intestinal health. I've been quite bloated, extremely hungry (although that seems to be subsiding) and have been experiencing a painful sharp pinch in my lower abdomen by my left side (close to belly button area). I have also been experiencing weight loss (I'm hypo thyroid...taking levothyroxide; weight loss is an indication of the medication working, however, I've been eating much more than I've normally used to). Any idea of what any of the may mean? Also, I drink lots of water but seem to be holding on to excess water for quite some time (more than a year)