Really bad cough and spotting

Estefania
Hi there! 
I am 9 weeks and a half. I got a cold last week and started developing a cough. I took robitussin as the doctor recommend it, but it has not helped me very much. My cough is getting stronger and today in the melting I coughed so bad that later in the day I went and found some pink spotting. I called my doctor and she said to give it a day and then see if I still have bleeding. 
Did anyone of you experience something similar with coughing or has any home remedies to help me out? 
Thank you ladies