This is Dr. David
how long have you had this hernia before?
tender is different from painful.
most hernias are reducible where you can easily push the bowel back into the abdomen
in these situations, surgery should be done as soon as possible, but is not an emergency.
some hernias are incarcerated where the bowel is strangled very tightly and if a large piece of stool gets into the bowel, the bowel can get stuck and strangulated in the hernia and that is a surgical emergency.
so your GP doctor should be able to examine you tomorrow and see what type of hernia it is.