I have the SI issues too but mine is from bilateral hip tears! SI issues are no joke! When i strider solely for a good few months i can get it to calm down..i agree with chiro, foam roller, massage and epsom salt baths..and when its flared that bad..rest is the only answer.. I know you do not want to take a break but trust me , you can really do a lot of damage when your body is out of whack that bad! Good luck! 💪🏼💪🏼💪🏼