Hi there,
Posting this in case it's of help to others who may be experiencing similar issues. The issue I mentioned in March got progressively worse, making it really hard to turn over in bed, get out of bed, cough or raise my leg without some kind of pain. It did resolve a bit with walking, but then came back again in certain positions, and there was a definite snap in my groin. It got to the point in the morning that I had to be really careful moving for fear the leg would give out.
I saw my doctor last week, and we determined that the psoas muscle was irritated, which is something that I had suspected. To my profound relief, the hip xray was perfect - no sign of anything that could be causing these symptoms. The leg asleep/pins and needles down the leg/strange muscular contractions up and down the leg symptoms were attributed to L5-S1 nerve compression.
He noted in an earlier xray that those discs in my lower back and sacrum are compressed, and that there's evidence of arthritis in some of them. Comparing one leg to the other, the sensation when being touched was reduced in the operative leg.
So, I am taking it a bit easier and using ibuprofen to lower inflammation. The snapping sensation has already stopped. He also recommended strengthening because I've been sitting so much (and sitting with bad posture). My belief is that a weak core and glutes in combination with bouts of more strenuous gardening activities are what caused this.
So...when you think it's a hip issue, it may in fact not be. What makes it hard until you have diagnostic imaging is that many symptoms of hip issues are also symptoms of spine issues.
Hope this is informative,
-Doug