What Causes White Clumpy Discharge During Urination?

I was passing urine today and noticed a raisin sized white clump in the bottom of the toilet there's no odor and I feel fine. I heard this was a pregnancy symptom but I'm not sure if I'm pregnant yet. I have sore breasts and nausea and so far no period. But every test I've taken said negative so I'm confused the last time I had unprotected sex was December 14 so it might be too early. so what arey chances of being pregnant and is that clump normal?