Sacrum and SI Pain, feels like Sciatica

I had sciatica too. Was extreme and I had to take 1.5 weeks off from work before I could even walk around the house, let alone get to office. Was right around 26 weeks.
A few things helped me
1. PT (Looks like you are already doing that.)
2. After any PT or exercise, I would use a massage roller to ensure there's no tightness in the muscles. This is what I used
Muscle Roller, Massage Roller Stick for Athletes, Help Reducing Muscle Soreness Cramping Tightness Leg Arms Back Calves Muscle Massager https://a.co/d/jclVO9T

3. Applied ice pack initially to bring down swelling after exercises.

4. Before I slept I lay on a heat pack for 5-8 mins , targeting where ever I was sore.
5. Also realized most of my pain is on my left because I had a tendency to sleep on my left most of the time. So I switch everyday. One day i lay on my left, the next on right and so on

Yours def sounds way worse than mine, but hang in there, as your muscles strengthen with the help of PT, it gets better .

I feel for you! I had horrible sciatica pain. This little cuff was a miracle worker that my mom found in the last few weeks of pregnancy. Hang in there. Immediately after delivery this pain went away. I hope you get some relief soon and have a smooth delivery 🤍 BeActive Plus Instant Relief Acupressure Calf Brace for Sciatic Nerve Pain, Black https://www.walmart.com/ip/949373881

The same I hope your okay ?

like how immediately some people just don’t understand that this is not a pulled muscle this is hitting nerves . With a pull muscle I can operate. I had this feeling since Thursday and I was able to get around and walk but than it got worse throughout the night