is it what i think ? :)

i have been bleeding for 6 days now. little to no blood only had to use a tampon 3 times and still didnt fill a tampon . i also found clear sticky discharge when i whiped as well as weird feelings including cramps in my stomach using the bathroom about 20 times a day got sick 3 times in the past week headaches and constipation but i have gotten 2 negitive pregnancy test . when should i try again to test and does it sound as if i may be pregnant?