Please help !!

Nikki

I felt like i had to go pee and i went to use the washroom at school and my discharge is clear with drops of blood in it. I got my period on the second and it ended on the 7th. My period was 4 days late and i had brown light discharge from the 30 to the 2 and my period only lasted for 6 1/2 days. I am sexually active with my hubby and i took a test and i not pregnant but after my period i had yellowish pale white discharge and im im having some mild cramps and im not sure whats going on!! Please help!!