Hi Dona,
I have been fighting that nauseating sacroiliac pain for years...close to 10-12 yrs...I have never found a cure. I have been followed by chiropractors, physiotherapists, a rhumatologist and goodness knows what else but there is no 1 fix-it-all.
In the end I have come to understand that the best medicine is physical activity and my enemy is sedintarism...if I sit or lay down for a long while I cannot get up. So I keep moving most of the time. Walking, climbing stairs or hills help (I do a lot of climbing due to the geography of where I live) so when I am ok I walk & or climb at least 1/2hr a day or more (I like to push past 1hr because then I feel 'light' and painless for hours)...that is the 1st sign of inflamation...you feel less pain the move you do.
Ice is my next favorite thing. I never realised how much it helps until I wrecked my knee a couple of months ago...all the creams, treatments and lotions did nothing but an icepack 2-3xs/day worked miracles. I started using it on the sacroiliac joint and on the sciatic and for at least a couple of hours afterwards I feel no pain.
I take NSAIDs daily (right now I am coming off of a long and painful flare so I have been taking napoxine for the last 5 months 220mg 2xs/day...could probably use more but I don't want to push it.)
When I am around a pool I prefer aqua-gym (my own homemade variety). I use ballet & yoga exercises that I learn from a book and do them in the water. They help a lot. Add a 'noodle' or other floaty devise and just 'play', float, jump, swim...
I am no olympic swimmer but with a noodle wraped around my chest or behind my back I can do laps for hours with little or no effort. Just don't over do it in the begining...Work your way up from 15mins. Don't neglect your abs that hold the rest of you up.
I have found that if you look around you sport is everywhere and you can add a lap to the grocery store aile or park at the other side or the garage...any and all exercise helps.
If you sleep on your side put a body pillow along side you and throw 1 leg over it, it eases the pressure on the lower back. If you sleep on your back put it under your knees and feet.
There are tons of tricks...try them all and then keep the ones that work for you.
Hope that this helps
Sharon
ps? Have you checked your Vit D levels? Apparently that influences the pain level too.