hi welcome to hcm.see if your pregnancy
test negative then there are less chance that u pregnant.missed periods may be due to stress
or infection as u said creamy discharge comes,was it smelly? if ur gyna not available then concern any other gyna.as per your symptoms it may be PID infection in which pt having white discharge plus lower back pain
.u drink plenty of fluid.plus sit on warm bath tub with dettole in it.