One thing I could no longer do was 'suck it up'. That's pretty much what the last physio told me and I didn't think it was good enough. So, I asked around and was referred (by an osteo) to an osteo near me who could help. Trust me, the exercises they give you, as well as the right manipulations, have you feeling infinitely better. You still have to be careful in your movements because of the extra relaxin, but you can manage it better, so that when it flares up you know it's because you have let the area get tight (from not stretching correctly), or because you have let your movements get sloppy (uneven weight distribution).
You DO NOT have to live with the sledgehammer feeling, and any professional who tells you you do just doesn't know what to do about it, so please get a second opinion like I did. Put it this way, I'm back horse-riding, firefighting, longer-duration baby-wearing and my SPD has gone from horrendous to barely noticeable (noticeable when I've not nurtured myself with 4 mins of stretching).
It's up to you. If you're happy being told you need to suck it up because it's 'one of those things' or it 'goes with the territory', then that's fine. Just know that there are things you can do now to get it better. They'll tell you to wait till after the baby is born, but it's not true
I just wasn't going to take it lying down (literally, sometimes!!).