I recommend going to the doctor if you haven't had your yearly pap test yet. I put my pap test off by just 3 months over, and ignored a discharge and spotting, and my pap came back from the HPV test with level III dysplasia. So now I need to go for a cone biopsy to remove the pre-cancerous cells. So I recommend all women get yearly pap tests - even if you're married 19 years like me! You know your body and when something isn't right - I wish I had gone when I first started the symptoms, so they could have caught it earlier! Good luck and take good care of yourself!
You cannot use your discharge to determine whether or not you're pregnant. In fact, while we use egg-white cervical mucous as an indicator of ovulation, many women have this at various times of the month.
You're just going to have to wait til your period is late and test again.