Hi, groin glands (lymph nodes) can enlarge and become sore in case of infection or injury
to legs, infection of genital area and certain sexually transmitted diseases. Chills, nausea
etc may indicate infection. Blood tests, work-up for VD and a sonography
will help. If you are sexually active, use barrier contraception
till things improve, also get your partner evaluated. Take lots of fluids. Take care.