Answer:
You are often advised against douching even when you are no pregnant and doing that during pregnancy comes with a lot of risks of infection and stuff. Unless for any special reasons your doctor recommended douching during this period you should not do it. If you think you have any kind of infections, go to your doctor and he/she would recommend an appropriate treatment for you.
You are not supposed to use douche's anytime. They put chemicals in the vagina and dry it out and can cause infections. Knowing that, it is probably not a good idea to do it while pregnant.