Hey, you can do it. I worked out intensely throughout my 1st and 2nd trimester. Once I hit my 3rd my body just wouldn't let me do some of the things I used but I made modifications. I had about 4 weeks of severe SI joint pain, and walking was agony, running out of the question and most lower body weights (squatting, lunging, etc.) but thankfully I could still cycle, so I did 45 minutes of HIIT cycling combined with upper body weights and some rowing. Finally the baby shifted position and the severe SI joint pain let up and I was able to resume most of my activities. At 35 weeks I still workout 5 days a week 45-60 minutes (used to be 60-120 minutes) although you just can't get to a high intensity at this stage in the game. I am all baby, I started at 115 lbs and am 129 lbs now, only 5 weeks left. Despite that your stomach does limit what you can do. I stopped all core work at about week 22. I had to stop kettle bells (well at least the swings and snatches) at about week 26, I have pretty much given up rowing at this point. I run about 1-2 times per week but it's a slow jog, cardiovascularly I feel I could go faster but my body won't allow it. Cycling is still great, non-painful and I get some intense intervals in. Elliptical isn't bad, although it occasionally causes some SI joint pain. I don't have the balance anymore to do free weight lunges, deadlifts, single leg stuff etc. BUT the TRX suspension has been a godsend and I get awesome strength workouts with it. I don't know about the stair climber (I don't have one in my home gym). In regards to yoga, I continued normal routines (and Barre and Pilates) up until my third trimester. Then my stomach got in the way for a lot of the poses. I have done some pregnancy yoga this trimester, but have given a lot of that up. I think mainly because I just got bored with it because it's a lot of sitting poses and downward dog and cat-cow. The stomach has really really affected my balance so I have a hard time with all the lunge and warrior poses and everything else, I just fall over. Anyway, it's really only these final weeks that everything exercise wise really takes a nose dive. Even though you will notice a progressive decline in your power and intensity throughout the pregnancy, I didn't find I really was that limited until about 2-3 weeks ago. Anyway, now I have only 5 weeks left and I find I am caring much less about anything exercise because it is hard just "being". Even though I haven't gained much weight and am "all baby" having a 6 lb baby inside you just makes life tough and tiring. That being said I am still getting in 45-60 minutes 5 days a week, hopefully I can keep that up for these final weeks, but who knows, everyday seems to be different at this point. Oh, and on a side note at about week 25 I started to become extremely short of breath, palpitations, falling asleep constantly, etc. Turns out I was pretty anemic due to iron deficiency (despite starting pregnancy with a very good Hgb level and being on pre-natal vitamins with iron). Once I started high dose iron supplementation I felt way better. As a pregnant athlete just be cognizant of that. I wouldn't start anything unless your doctor advises you too, but I wish I had got my iron checked earlier (waited until 28 weeks) it would have saved me several weeks of feeling like crap.

Haha I love it!

Words of encouragement: my first baby I gained 50(!) pounds. Second baby I had gestational diabetes and through careful logging and eating I gained only 22 pounds - perfect gain for my prepregnancy weight. It can be done!

Congrats Hey Qually guess who's pregnant too? I am 6 weeks what about you. My medical team told me for 1st trimester to keep doing the same exercise regimen. As you progress there might be a few things you can't do anymore as efficiently. I was told I would have to reduce intensity as the pregnancy progresses. Also I believe as you get in the 2nd, but surely the 3rd trimester you can't do exercise that require you lie on your back anymore, the weight of the baby occludes the vena cava and you can become dizzy and faint. Just mention your exercise routine to your Dr. whenever you see him and he will tell you when to and how to modify your exercise, but you can definitely keep moving.
How is the diabetes? mine came back uncontrolled with a vengeance and I am back on insulin, despite that before pregnancy I was off med and control by diet and exercise