Your early pregnancy test is not going to tell you now if you are pregnant or not. You need to wait until 7 days after your period would usually start to take a pregnancy test, even an early pregnancy test.
The symptoms that you described could be PMS; they could also be brought on by stress (which you might have worrying about if you are pregnant or not); additionally, you mentioned discharge but not what color it is. If the discharge is brown it is old blood that your body is getting rid of; if it's white or yellowish in color it's an infection; if it's pink or red spotting, it could be breakthrough bleeding which might occur instead of your period.
The symptoms you described are also very common with a ******* tract infection. Especially the frequent urination. Have you take an over the counter test for a UTI? I recommend you do that first, before you take another pregnancy test.
I wish you the best of luck, try not to worry. Wait until your period has passed (whether you get it or not) before you start worrying!