There is no need to be concerned at this increased tendency for your gums to bleed when you are pregnant. It is caused by the elevated hormone levels in your blood that you get when you are pregnant. It makes your gums more sensitive to the presence of plaque bacteria. The gums become inflamed more easily, leading to redness, swelling and bleeding when you brush.
Continue cleaning and brushing your teeth and gums as best you can with the aid of a mouthwash if necessary. Using a toothpaste with 1450 ppm (parts per million) of fluoride. Visit your dentist and hygienist, this is a good time to have your teeth checked and cleaned. You will also learn how to improve your oral hygiene technique.
Remember, your gums will return to normal after your baby is born.