Congratulations 🙂
I've never been pregnant but a couple of my friends who are keen cyclists have. One carried on commuting to work till about 30 weeks, she had to change from her road bike to her mtb to accommodate the bump 🙂 the other did a half marathon at 14 weeks, and carried on as she describes it "cycling till about 24 weeks" and "riding her bike" till about 34 weeks.
Also remember the racer Sally Hibberd saying she was still using her turbo trainer up till the day before she delivered 🙂