Hello, I would be happy to help you with your question.
The cramping and change in discharge is possibly related to mid-cycle ovulation, but given the fact that you are late for your period, you should check a pregnancy
test now and repeat it in one week. If these tests remain negative, then it would be worth talking to your doctor about an evaluation of the left lower quadrant pain and non-cycle bleeding with an exam and ultrasound
I hope that this helps. If you have more questions, please click on "ASK ME A QUESTION" link above to directly ask me a question!