My abdomen on right side where the ribs end is tender to touch and can feel it through to back. There is a wierd discomfort when not pressing on it. Movement doesnt really seem to effect it. It is very worrisome to me as I have never felt this before. I took my temperature it was 99.7. I dont really feel like its an emergency should I wait to see if it passes or go ahead and go to an ER. It started today. I am 29 and female last cycle started November 26. Im at a lost to what could be causing this.