Ovulation

I always used to be able to tell when I was ovulating, my boobs would hurt and I'd get the clear thick discharge. But the past few months it hasn't been happening at all. No sore breasts and no discharge or anything telling me I'm ovulating. I'm wondering if maybe there's something wrong and I'm not ovulating? I'm 20, it was regular and normal from when I was 14 until about 3-4 months ago and it just stopped happening. Not sure if I put this in the wrong group so I apologize if I did.