Get one . The cdc currently recommends all pregnant women receive the tdap vaccine in each pregnancy regardless of their last dose. It can be given at any time with the optimal timing being between 27-36 weeks to maximize the moms antibody response which provides passive immunity to the infant. This provides protection against this deadly disease for the mom and baby.
Per the CDC. If a tetanus and diphtheria booster vaccination is indicated during pregnancy for a woman who has previously not received tdap (i.e., more than 10 years since previous td), then health care providers should administer tdap during pregnancy, preferably during the third or late second trimester (after 20 weeks’ gestation).
Get it! Tdap is safe in pregnancy, although we prefer to give vaccinations like that in the second or third trimester. Pertussis is starting to be a problem for babies and vaccinating the immediate family is now recommended. So if you haven't had a tdap in the last 10 years, please get a booster during pregnancy or before you leave the hospital.