I have pain in what sounds like a similar place which flares up from time to time. It's when my sacro-illiac joint "locks" on one side and won't move freely, causing me pain. I have manual manipulation to unlock it again from my physio. He tells me to do glute mid/med strengthening exercises.
Obviously can't say if you have the same problem you need looking at.
Hi, nothing to advise with the condition, other than to sympathise. I have a chronic problem which is preventing me from running and it is pants.
If you need to rest from running for a while, find another form of exercise which you can do and focus on that, I know it's not the same but any exercise is better than none, helps you mentally. Be it yoga, pilates to strengthen your core or a weight training programme - look at kettlebells or invest in dumbbells for home use, doesn't have to be gym based. Look at a press-up challenge. If you do join a gym or are already a member, look at rowing. T'ai Chi even. Try different activties.