My mum had cervical cancer and was given the all clear in the last year or so. If she hadn't had that smear she would be dead right now.
The choice is yours, though you shouldn't let fear get in the way of your health. It is your choice though at the end of the day.
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OP, your discharge should NOT be green, but if it is that light creamy colour snot can often represent then it sounds normal.
Obviously if you are still worried get your GP to have a look, or visit your local GUM clinic.