As someone who was super active during pregnancy, both working out and riding horses, I would say no. It is only my opinion, but as your belly grows and there is already pressure on your ligaments, joints and everything in between. I would counsel my younger self (and you) to take it slower and do low impact exercise only. My second pregnancy ended 5 weeks too early with a baby in the hospital for 10 days.
You can still work out hard, just not the jumping Jax and bouncing around after you start to show.
Enjoy this experience!
Best of luck to you,