When I stand up from sitting,and walk,as soon as I put weight on the right foot, I get severe pain in right lower abdomen below waistline.This started 2 days ago. No fever.No nausea or vomiting.McBurneys Point ? doesn't make it worse or better. When I lay down on either side I am mildly uncomfortable but tonight its is enough I can't sleep.I have no ovaries or tubes but could it be a cyst and not appendix?