You should talk with your doctor, i had the same problem and then noticed the dischage was more different and it turned out i got an yeast infection, had no clue what it was because it was my first time getting it, i heard that thats more common to happen when your pregnant
During pregnancy my amount of discharge always increases. But if it's a sudden increase and not what you have been having in the past couple of weeks I would call the doctor just to be sure. It's probably nothing but it always gives me peace of mind to be sure.
Maybe have your doctor check to see if you have an infection?