Have your periods been normal since having your son? Have you been having unprotected sex? If you have, even if you haven't missed a period, take a pregnancy test or better yet...call your doctor. It could be quite serious or it could be "nothing to worry about". Better to be safe than sorry.
hi elizebeth
Ur signs and symptom give an indication that u might be having either infection in ur lower abd now that can be either Urinary tract infection or Pelvic inflammatory disease ( PID) . Do u get burning micturation or any discharge from vagina.
It could also be kidney stones , ureteric colic .
U should drink lots of water and consult ur physician as soon as possible and don't neglect the symptoms.
take care ,
bye