well i had two issues at two differnt times
first one was in the rear of the pelvis,
this was very very sharp and could just freeze me in my tracks
it was the SI joint right in the side of were the tailbone ataches to the pelvis, it would just kill me if i laid on the back for any abount of time, specially if i was laying reclined rather than sitting striaght up or laying perfectly flat (though the falt still hurt) it seemed to just hurt when i went to moved out of hte position. it seemed like it even sucked my strength to move out o the bad position from me, was really scarry
for this rear issue i found getting face down on all fours and then spreading my knees apart as far as was totally confortable and having dh press or rub on the area a bit, really helped a ton, or even just staying like that for a while, u could just lay down my top half and settle in with my knees spred and my but in the air. i avoided the issue by avoiding being in a low reclinded postion, like half sitting half laying on pillows that i would have a habit of getting into when reading in bed.
Now later on i had a issue right in the front
this was dull and throb, almost like a very bad bruise but clearly in that bone or cartilage, like the after effect of a bad bone briuse on a shin
and i think what i was doing to help the rear would not work for me anymore cause it might bother the front, thankfully i did not half both at once.
my recent issue was clearly in my pubic symphysis and was really scaring me that it was here to stay since it was a nearly 24hour issue. nothing seemed to set it off.
so after reading i got really big on keeping my pelvis square, sitting really straight, sitting down and leaning over to put pants on rather than lifting legs while i was standing. i also had to change the way i was sleeping, i usually had slept on my side leaning to my front and with one leg kinda jackknifed up, i bit like the letter "h", i read that being in positions that tilted your pelvis , specially for long periods was one of the issue, so i put a pillow between my knees and worked hard to keep my knees at the same level as each other, so more on my side and both legs bent up or straight down depending on how i felt., avoided stairs like the plague, and sadly stopped sitting in any thing that looked like crossed legs or lotus.
low and behold 2-3 days later it is 98% gone, it may have taken longer if i had not caught it so quick, but i'm now just doing the same thing but not as obsessively. it seems to be keeping it gone and i feel good that i will be as stringent as i need at any particular time depending on if i can feel anything going on.
anyway that is what was happening and worked for me, YMMV