Yes! Before you row, take a deep breath in, and on the exhale really pull your lower belly in ("hug your baby") to engage the abdominals and protect the lower back — just doubly important when you're carrying extra weight on the front. You can also try it with one knee and hand on a bench and just do it one side at a time, like this: https://images.squarespace-cdn.com/content/v1/5fd233f593924201cc854b5e/1608393504113-E0GVC9A7ZGCSY3WL9A3Y/3rdtrimester-23.jpg?format=2500w
Of course, if anything feels painful or off, stop immediately.
(PS congratulations?!?! Meeeeep!)