I have had the same thing and so have many others. Same exact process bloodwork scans xrays even a hip aspiration nothing. All good. To compound the problem in trying to seek for an answer the clinic I was going to really had staff problems and I unfortunately have worked in this field my whole working life starting in nursing.. the care was very concerning for my own urgency and bone health I decided not to go back. I have sought out another physician that has a great deal of knowledge about the prosthesis. I fear I may have to have a revision. They make one with more stem end flexibility. Sometimes the prosthesis is not a good fit and you get 'end of stem pain in the thigh. I had to look all of this up myself. The other poss problem is that because the prosthesis will absorb the impact of walking etc. Your own bones do not continue to regenerate they call it 'stress shielding'. At any rate I have an appt next week let you know how I feel after that. My thigh pain comes and goes. Today I can walk. Tomorrow? Who knows. Walking sitting standing weight bearing on that leg will put me back in bed.the only comfortable place. Even sitting in the recliner or on the couch for 15 min will illicit pain when I get up. I worked really hard after being sick not just w my hip to get healthy and active again. I have lost weight new meal plan on keto anti inflammatory diet. But now I cant work out I have tried after pt in off and home. So bummed...have hope I will check back after next wk. My surgery was July 2017. I have always experienced this pain intermittently and told my doc. I also have severe groin pain when it kicks up....I am in tears sometimes when it cramps up. Hang in there folks. Pain is not normal and we arent all crazy. There has to be an answer and a solution.