I sometimes 留牙血 ga, and asked my doctor before , he said some of the pregnant women will like it and give me monthwash. Doctor said no need to see dentist as nothing the dentist can do at this moment, we can't do X ray now ga ma
After use doctor's monthwash, i think the situation is much better. Then use Listerine monthwah sometimes . Until now it only have little teeth blood sometimes not serious.
For 鼻血, I also have 2-3 times from having baby till now ( around 37 weeks) , the first time is in winter the weather is too cold, doctor said it is because of weather too dry , and the following 2 times only got little so I think may bemy nose is too clean and no ask doctor.
If you are worry about it , you can ask the doctor . I only can share my experience with you ,not professional advise.
Wish your baby and you will be healthy