Congrats on your pregnancy! It is not uncommon to have bleeding gums due to hormonal changes. I did have more sensitive gums. I also do see a dentist every half a year and continued to do so during my pregnancy. The dentist advised to maintain general oral hygiene practices, which are brushing and flossing. She's a female dentist, Dr Pong, at Unity Denticare mid point orchard.
Do consider seeing a dentist if you're concerned. Oral health is also important!