So I tested this morning and got a negative.. I got cramps this afternoon again and they were a…

So I tested this morning and got a negative.. I got cramps this afternoon again and they were a little stronger so I put a pad on just incase.. nothing has come out only light pink when I wipe. if I had my period I would've been through at least 3 pads already because my are heavy the first two days.. I'm so confused??