Coughing up white chunks. 10wks6days 3rd baby.

I've been coughing these weird chunks up even before I got pregnant. It happens even when I'm not eating so it's not food. I've always had a bad cough like really bad. No meds ever calm it. But these chunks are freaking me out. What could they be. My mom wont even tell me why shes all freaked out by it so that's making me panic more. I'm scared and confused.