Yesterday i had a pain in the lower left side of my stomach it then moved into my lower right side it is causing me to feel sick and have no appetite?

Get checked out.: if your pain is still there today, particularly if it is tender to push on the right lower side of your abdomen, you should get checked out. The appendix is located in the right lower portion of the abdomen, and your description could fit the common pattern of early appendicitis. There are other things that could cause your pain also. If it is still present, get it checked out ASAP. Good luck.