Sorry to hear that. I can certainly sympathise.
Follow any professional advice given it’s not something you want to get worse. If the pain goes on for more than a few months push your doctor for referral to a specialist and get an MRI, don’t piss around with people essentially taking guesses about what the problem is.
I’ve had SI issues since 2008 and it’s been very disruptive to my overall fitness not just cycling. At times I’ve found it very disabling. Episodes of inflammation and pain come every 3-6 months lasting for 2-10 weeks making it impossible to exercise and sometimes even walk (on occasion reducing me to tears)
Usual cycle begins with SI pain, and then pain in glutes followed by sciatica type pain with muscles in spasm.
Lots of money spent on chiropractors, osteopaths, physios and the odd trip to the doc.
Chiropractors, Used to swear by them, now I’d never go near one again. I do feel that they turned this into chronic problem by all their aggressive clunking and clicking.
Physios: Hit n miss.
Osteopaths: The best for me. Soft tissue work being the most beneficial. Even then it’s taken more than 3 years and 4 different osteopaths to find right one.
Things I’ve learnt on my SI joint journey and the possible causes / aggravations:
Tight IT bands
Tight piriformis
Tight psoas
Leg length imbalance
Tilted pelvis
L5 S1 disc issues
Labral tear
Traverse tear
Sitting down for a living
Running
Walking on uneven ground
Muscle imbalance
Breaststroke swimming
Things that benefit SI pain:
Ice
Foam roller – IT band and piriformis
Psoas stretches
Osteo – soft tissue work
Hamstring stretches
Weight loss
I’m now in the hands of a very good Consultant Rheumatologists. Last week I had an MRI and tomorrow I’ll found out the results. Then, all being well, I’ll get a definitive diagnosis, then I can begin my rehab with clear knowledge about what I can I can’t do.
Good luck.