Pregnancy Gingivitis

I have always gotten compliments on my teeth, and I tend to take good care of them. And yet I still have the gingivitis symptom! At first it was just a little soreness while brushing and a little bleeding. But now it is an absurd amount of pain on one side. I’ve noticed it is the side I tend to chew on, so I’m trying to chew on the opposite. I have now switched to gingivitis fighting toothpaste and mouthwash. I have always been slack on flossing so maybe that is the issue. So I am flossing now. But it hurts so bad that I forgot my wisdom teeth were coming in. This beats that pain any day. Any advice on how to fight this or anything you have experienced with this?