I am about a week late missed period i usually get it between the 26th - 1st of every month.i'm also having watery discharge low back pain answers plz?

Could be Pregnant: It's a little too early to take a home pregnancy test but if you have been sexually active w/o birth control you could be pregnant. Your doctor can do a more sensitive test by drawing your blood to see if you are pregnant. If you had unprotected sex i would advise being tested for stds and pregnancy since you have vaginal discharge.