My mom's been complaining about pain on the left and right side of her stomach and lower back. She's also said that she see's blood when she urinates and there's also a slight sting. The pain worsens at night, but it's still present during the day. She also hasn't eaten as much, but she hasn't felt the need to vomit. I think it's either a urinary tract infection, appendicitis, or a kidney stone, but we're not sure.