Congrats! I am 21 weeks right now and did my last horse trials (prelim) at 12-13 weeks. I am not a pro rider but work in the industry (eq vet) so can totally relate to the fatigue and nausea being terrible, especially when you have to spend the day on your feet and out in the heat. My last event I made it around, but it was a 1 day and I was totally exhausted by about fence 10 on xc- my saint of a horse helped me finish and we did well, but I took it as a sign because I didn’t want to keep going if I couldn’t do it well or safely. I am still riding, but have done an on-farm lease with my horse to a local college student, so mostly I just do hacks/trot sets when his leasee can’t make it out. I am still going to barre class and “running” (ok, mostly jogging/walking, but I think of them as my old running routine in my head :P) - just trying to stay as active as possible, although with work as busy as it is I am definitely more tired at the end of the day than pre-pregnancy. I didn’t believe people who said it would get better in the second trimester in terms of the energy and nausea, but it definitely does! I am still tired and some food still makes me gag, but in general I do feel MUCH better than I did! Now it’s dealing with the physical limitations of this weird growth (like, bending over to put on my boots and half chaps shouldn’t be so uncomfortable already, should it?!) but everyone carries differently and I know plenty of people at my stage who hardly feel pregnant at all (I secretly hate those people- they are usually the ones who also didn’t have morning sickness or fatigue, either! Life is so unfair sometimes).
I was comfortable jumping until I started to show. Many Drs aren’t comfortable with riding at all in pregnancy, mine was very pragmatic (her kids both ride so she is fairly horse savvy) but did agree it really would be better to not jump after the first trimester/when I started showing. That said, I know plenty of professionals who rode and competed up until their 7th month (!!). Kudos to them, I will for sure be a whale by that point and can’t see myself doing any riding well at that point. I plan to keep going as long as I feel safe, both with riding and work. I have had to temporarily “fire” only one patient so far (I do a lot of chiropractic so climbing up over horses and putting myself in generally vulnerable positions) for repeatedly kicking my blocks out from under me, and I won’t ride my husband’s baby horse anymore, but otherwise I’ve continued with business as usual as much as possible.
You’ll figure out what works for you and what you’re comfortable with, and I think you’ll be pleasantly surprised with how well people respond once you announce- I was scared I would lose a lot of business because people wouldn’t want the liability of a pregnant person working on their animal, but people have been great about it and I am very up front about what I feel safe doing or not doing with a patient depending on the scenario, which seems to make people more comfortable with the situation. Your students can still get lessons, and there’s plenty you can do from the ground once you no longer feel comfortable riding, and, as I have to remind myself on the regular, it’s a very temporary condition (thank goodness!).